is laid out as shown, and the edges are cemented with asphaltum and then tacked to the side of a fence or shed.
[Illustration: Trough of Roofing Paper]
** Ordinary Pen Used as a Fountain Pen [454]
It is a very simple matter to make a good fountain pen out of an ordinary pen and holder. The device is in the form of an attachment readily connected to or removed from any ordinary pen and holder, although the chances are that when once used it will not be detached until a new pen is needed.
Take the butt end of a quill, A, from a chicken, goose or turkey feather–the latter preferred as it will hold more ink–and clean out the membrane in it thoroughly with a wire or hatpin. Then make a hole in the tapered end of the quill just large enough to pull through a piece of cotton string. Tie a knot in one end of this string, B, and pull it through the small end of the quill until the knot chokes within, then cut off the string so that only 1/4 in. projects. Shave out a small stopper from a bottle cork for the large end
[Illustration: Fountain Attachment]
of the quill. This completes the ink reservoir.
Place the quill on top of the penholder C, so that its small end rests against the pen immediately above its eye. Pull the string through this eye. Securely bind the quill to the pen and holder with a thread, as shown, first placing under it a wedge-shaped support of cork or wood, D, hollowed on both sides to fit the curved surfaces of the quill and holder. The illustration shows the detail clearly.
To fill the reservoir place the pen upright on its point and dip a small camel’s-hair brush or cloth-bound toothpick into the ink bottle and “scrape” off the ink it will hold on the inner edge of the quill. Cork tightly, and the device is ready for use. When not in use place the holder at an angle with the pen uppermost. –Contributed by Chelsea C. Fraser, Saginaw, Michigan.
** How to Construct a Small Thermostat [455] By R. A. McCLURE
It is a well known fact, that there is a change in the dimensions of a piece of metal, due to a change in its temperature. This change in dimensions is not the same for all materials; it being much greater in some
[Illustration: Simple Thermostat; Couple and Mounting Strip]
materials than in others, while in some there is practically no change.
If two thin, narrow strips of different metals, that contract or expand at different ratio due to a variation in temperature, be rigidly fastened together at their ends, and the combination then heated or cooled, the combined piece will have its shape changed. One of the pieces will increase in length more than the other, due to a rise in temperature, and this same piece will decrease in length more than the other when subjected to a decrease in temperature.
If one end of this combined piece be rigidly clamped to a support, as shown in Fig. 1, and the combination then have its temperature changed, the free end will move to the right or left of its original position, depending upon which of the pieces changes in length the more. If there is a rise in temperature and the right-hand piece B increases in length faster than the left-hand piece A, the free end of the combined piece win move to the left of its original position. If, on the other hand, there is a decrease in temperature, the right-hand piece will decrease in length more than the left-hand piece, and the upper or free end will move to the right of its original position.
Such a combination of two metals constitutes a simple thermostat. If the movement of the free end of the combination be made to actuate a needle moving over a properly calibrated scale we have a simple form of thermometer. If two electrical contacts, CC, be mounted on the right and left-hand sides of the upper end of the combined piece, as shown in Fig. 1, we have a thermostat that may be used in closing an electrical circuit when the temperature of the room in which it is placed rises or falls a certain value. These contacts should be so arranged that they can be moved toward or away from the combined piece independently. By adjusting the position of these contacts, the electrical circuit will be closed when the temperature of the thermostat has reached an experimentally predetermined value.
The following description is that of a thermostat, constructed by the author of this article, which gave very satisfactory results. First obtain a piece of steel, 6 in. long, 5/8 in. wide and 2/100 in. thick, and a piece of brass, 6 in. long, 5/8 in. wide and 3/100 in. thick. Clean one side of each of these pieces and tin them well with solder. Place the two tinned surfaces just treated in contact with each other and heat them until the solder on their surfaces melts and then allow them to cool. A better way would be to clamp the two thin pieces between two heavy metal pieces, and then heat the whole to such a temperature that the solder will melt, and then allow it to cool. This last method will give more satisfactory results than would be obtained if no clamps are used, as the thin metal pieces are liable to bend
[Illustration: Support for Couple, and Needle-Mounting Strip]
out of shape when they are heated, and as a result they will not be in contact with each other over their entire surfaces. After these pieces have been soldered together forming one piece, which we shall for convenience speak of as the couple, two small holes should be drilled in one end to be used in mounting it, and a notch cut in the other end, as shown in Fig. 2.
Cut from some thin sheet brass, about 2/100 in. in thickness, two pieces, 1/4 in. wide and 1/2 in. long. Bend these pieces of brass over a piece of hatpin wire, thus forming two V-shaped pieces. Cut off a piece of the hatpin, 5/8 in. long, and fasten it across the notched end of the couple by means of the U-shaped piece of brass, which should be soldered in place as shown in Fig. 3. All superfluous solder should then be cleaned from the couple and the steel pin. Now bend the couple so as to form a perfect half circle, the brass being on the inside.
The base upon which this couple is to be mounted should be made as follows: Obtain a piece of brass, 7 in. long, 3/4 in. wide, and 1/4 in. thick. In this piece drill holes, as indicated in Fig. 4, except A, which will be drilled later. Tap the holes B, C and D for 1/8-in. machine screws.
Cut from some 1/8-in. sheet brass a piece, 1-7/8 in. long and 3/4 in. wide, to be used as a support for the couple. In one end of this piece drill two small holes, as indicated in Fig. 5, and tap them for 3/16-in. machine screws. In the opposite end cut a slot, whose dimensions correspond to those given in Fig. 5. Now bend the piece, at the dotted line in Fig. 5, into the form shown in Fig. 6, making sure that the dimension given is correct. This piece can now be mounted upon the piece shown in Fig. 4, by means of two brass machine screws placed in the holes B. The slot in the support for the couple will permit its being moved along the mounting strip, the purpose of which will be shown later.
Next cut another piece of 1/8-in. brass, 2-3/4 in. long and 5/8 in. wide. In this piece drill two 1/8-in. holes, as indicated in Fig. 7, and then bend it at the dotted lines into the form shown in Fig. 8. Mount this strip upon the main mounting strip by means of two brass machine screws placed in the holes C, so that the upper part is over the center-punch mark for the hole A in the main mounting strip.
You are now ready to drill the hole A, which should be done as follows: Remove the piece you last mounted and then clamp the main mounting strip in the drill press so that the center-punch mark for the hole A is directly under the point of the drill. Then remount the piece you just removed, without disturbing the piece you clamped in the drill press, and drill a small hole through both pieces. This hole should be about 3/64 in. in diameter. After this small hole has been drilled through both pieces, a countersink should be placed in the drill chuck and the hole in the upper piece countersunk to a depth equal to half the thickness of the metal in which it is drilled. Unclamp the pieces from the drill press, turn them over, and countersink the small hole in what was originally the lower piece. The object of countersinking these holes is to reduce the bearing surface of a small shaft that is to be supported in the holes and must be as free from friction as possible.
We may now construct the needle, or moving portion of the thermostat, which should be done as follows: The shaft that is to carry the moving system must be made from a piece of steel rod, about 3/32 in. in diameter. Its dimensions should correspond to those given in Fig. 9. Considerable care should be used in turning this shaft down, to make sure that it fits perfectly in the small holes in the supporting pieces. The shaft should turn freely, but it must not be loose in the holes, nor should it have but a very small end play.
Cut from some 1/32-in. sheet brass a piece whose dimensions correspond to those given in Fig. 10. Drill a 1/8-in. hole, A, in this piece, and cut a slot, B, from one side of the piece into this hole, and a second slot, C, along the center of the piece as indicated in the figure. Considerable care should be exercised in cutting the slot C, so that its breadth is exactly equal to the diameter of the piece of steel wire fastened on the end of the couple. Also make sure to get the sides of this slot perfectly smooth. Cut from some 1/8-in. brass a disk having a diameter of 1/2 in., and solder it to the end of the needle. The dotted line in Fig. 10 indicates the proper position of the disk. Now drill a hole, D, through the disk and needle, of such a diameter that considerable force must be applied to the steel shaft you have already made, in order to force it through the hole. Force the shaft
[Illustration: Shaft for Needle and Needle]
through this hole until the needle is exactly in the center of the shaft.
The parts of the thermostat thus far made can now be assembled. Place the steel shaft in its bearings and see that it turns perfectly free. Then place the steel pin, on the end of the couple, in the slot C, and fasten the
[Illustration: Wiring Diagram for One and Two Bells]
other end of the couple, by means of two machine screws, to the support made for the couple. Increase or decrease the temperature of the thermostat and note the results. If everything is working all right, the end of the needle should move when the temperature of the thermostat is changed. The amount the end of the needle moves can be easily changed by moving the support or the couple toward or away from the shaft supporting the needle, which changes the position of the steel pin in the slot C. The nearer the steel pin is to the shaft supporting the needle, the greater the movement of the end of the needle due to a given change in temperature.
A small piece of white cardboard can be mounted directly under the end of the needle by means of small brass strips, that in turn can be attached to the lower ends of the main mounting holes D, Fig. 4. A scale can be marked on this piece of cardboard by noting the position of the needle corresponding to different temperatures as determined by a thermometer. When this scale has been completed, you can use the thermostat as a thermometer.
Two contacts may be mounted, one on each side of the needle, in a manner similar to the method suggested for mounting the cardboard. These contacts should be so constructed that the end of the needle will slide over them with little friction, and so that their position with respect to the end of the needle may be easily changed.
[Illustration: Assembled Thermostat]
Both contacts must be insulated from the remainder of the thermostat, and may or may not be connected together, depending on how the thermostat is to be used.
It would be advisable, if possible, to have the part of the needle that touches the contact points, as well as these points, of platinum, as the arc that is likely to be formed will not destroy the platinum as easily as it will the brass. A small wooden containing case can now be made and the thermostat is complete. There should be a large number of holes drilled in the sides, ends and back of the case so that the air inside may be always of the same temperature as the outside air.
In adjusting, testing, or calibrating your thermostat, make sure that it is in the same position that it will be in when in use.
The connections of the thermostat for ringing one bell when the temperature rises or falls to a certain value, are shown in Fig. 11. The connections of the thermostat for ringing one bell when the temperature rises to a certain value and another bell when the temperature falls to a certain value, are shown in Fig. 12. The complete thermostat is shown in Fig. 13.
** A Tailless Kite [458]
The frame of a 3-ft. kite is made of two sticks, each 3 ft. long. These are tied together so that the cross stick will be at a distance of 15 per cent of the full length of the upright stick, from its end, or in this case 5.4 in. The sticks may be made of straight grained pine, 3/8 in. square, for small kites, and larger hardwood sticks, for larger kites.
The cross stick is bent into a bow
[Illustration: Plan and Dimensions for Kite]
by tying a strong cord across from end to end. The center of the bend should be 4-1/2 in. above the ends. The bend is shown in the sketch. Connect all four ends or points with a cord, being careful not to pull the bend of the cross stick down, but seeing that it remains straight across the kite. When this is done the frame is ready for the cover.
The cover will require 2-1/2 sheets of tissue paper, 20 by 30 in., which should be pasted together as the sketch indicates. Cut out the paper, allowing 2 in. margin for lapping over the cord on the frame. Place the frame on the cover with the convex side toward the paper and paste the margin over the cord, allowing the paper to bag a little to form pockets for the air to lift the kite. The corners should be reinforced with circular pieces of paper pasted over the ends of the sticks.
The flying cord is attached to the points A and B of the frame. There is no cross cord. The kite will fly at right angles to the flying cord. It is easily started flying from the ground by laying it with the head toward the operator and pulling it up into the wind.
–Contributed by Chas. B. Damik, Cooperstown, N. Y.
** The Levitation – A Modern Stage Trick [459]
This illusion has mystified thousands of the theater-going public, in fact, it has been the “piece de resistance” of many illusion acts. The ordinary method of procedure is as follows: The person who is to be suspended in the air, apparently with no support–usually a lady–is first put in a hypnotic (?) sleep. She is placed on a couch in the middle of the stage, and in most cases the spotlight is brought into play. The performer then takes a position close to the couch and with dramatic
[Illustration: Raising the Subject in Midair]
effect makes a few hypnotic passes over the subject. She then slowly rises from the couch until she has attained a height varying from 4 to 5 ft. above the stage, as shown in Fig. 1. The couch is then taken a way and a hoop is passed over the floating lady. The performer now causes the lady to float back to the couch or board that she may have been resting on, after which the so-called hypnotic spell is withdrawn.
In spite of the claims that the illusion owes its origin to Hindoo magic, it is nothing more nor less than a clever mechanical contrivance, the construction of which will be readily understood by a glance at the accompanying illustrations.
The bottom of the couch, if one is used, contains a cradle-like arrangement which fits the recumbent form of the lady and is connected to a heavy sheet of plate glass by means of a rod, D, Fig. 2, attached to one end, and running parallel to the side of the cradle. When the glass is lifted, the body of the subject is also raised, seemingly at the will of the performer. This is accomplished by the aid of an assistant beneath the stage floor. The plate of glass, E, Fig. 3, passes perpendicularly through the stage down to a double block and tackle. The end of the cable is attached to a drum or windlass and the plate glass held steady with guides at the sides of the slot in the stage floor, through which it passes. The winding up of the cable naturally forces the plate glass and cradle up, causing the lady to rise.
Some illusionists place the lady on a board on two ordinary trestles and cause the board to rise with the lady
[Illustration: Direction the Hoop Takes In Passing over the Board]
on it, as shown in the illustration, thus obviating the use of heavy paraphernalia as in the cradle attachment. The cradle attachment is also generally accompanied by a 2-in. iron bar, used in the place of the plate glass, the performer or operator standing at the rear of the couch to conceal the bar as it comes from beneath the stage. However, the method illustrated is the one generally used.
The solid hoop is passed over the body in the following manner: Start at the end, B, Fig. 2, passing the hoop as far as C with the hoop on the outside of the back horizontal rod. The side of the hoop toward the audience is then turned and swung clear around over the feet at A and entered between the rod and board on which the lady rests. The hoop is then carried as far as it will go back toward the end B. Then the side nearest the operator is passed over the head of the body apparently the second time and passed off free at the feet. Thus to the closest observer the impression is given that the hoop has encircled the lady twice. The illustrations give in detail the working of the illusion above the stage floor. No set rule is used for the tackle and drum below the floor.
CONTENTS
A
Accelerometer, Simple 93
Acid Burns, Treating 126
Acetylene Gas Generator, Homemade 57 Acetylene Lamp, Lighting 401
Aerating Water in a Small Tank 241
Aeroplane, Paper, How to Make 329
Aeroplanes, Model, Equilibrator for 11 Alarm, Burglar, How to Make 368
Alarm, Callers’ Approach 87
Alarm Clock Chicken Feeder 79
Alarm Clock to Pull Up Furnace Draft 107 Alarm, Electric 94
Alarm, Electric, Door Bell and 114
Alarm, Electric Fire, How to Make 430 Alarm, Electric, That Rings Bell and Turns On Light 337 Alarm, Electric Time 433
Alarm, Fire 47, 359
Aluminum Polish 428
Aluminum, Satin Finish on 198
Aluminum Wire, Insulating 306
Ammeter, How to Make 49, 203
Amusement-Boys Representing the Centaur 173 Amusement Device–Merry-Go-Round Thriller 209 Amusement Device–Merry-Go-Round, To Build 359 Amusement Device–Teeter Board. Revolving 297 Anesthesia, Electric 445
Animals, Small, Trap for 82
Annealing Chisel Steel 362
Annunciator, How to Construct 57, 416 Aquarium, How to Make 64, 210
Arbor, Grape, How to Build 73
Arc Lamp, Homemade 132
Arc Searchlight, Self Lighting 9
Arms and Armor, Imitation:
Part I 235
Part II 242
Part III 248
Part IV 263
Part V 271
Part VI 279
Part VII 284
Arms, Drip Shield for 258
Arrowhead, Flint, How to Make 23
Asbestos Table Pads, Homemade 212
Athletes, Weights for, How to Make 274 Atomizer, How to Make 158
Automobile, Boys’ Homemade 402, 430 Automobile Engine, Cooling Water for 236 Automobile, Greasing the Front Wheels of 320 Automobile Headlights, Adjusting 217
Automobile, Painting 357
Automobile with Sails 326
Axle, Cart without 291
B
Babbitt Ladle, Emergency 264
Babbitt, Ladle for Melting 173
Bag, Changing, for Plate Holders 212 Bag, Sewing, How to Make 386
Bags, Paper, Use for 19
Balloon Ascension Illusion 300
Balloon, Pilot, How to Make 118
Balloons, Paper, How to Make 215
Barometer, Homemade 151
Barometer, How to Make 188
Barrel Stave Hammock 75
Barrel Stave Sled 383
Baseball, Playing with a Pocket Knife 250 Baseball Throwing Practice, Device for 312 Bath. Shower, To Make 15
Bathtub Stopper, Substitute 429
Batteries, Connecting Up to Give Any Voltage 93 Batteries, Dry, To Obtain Cheaply 410
Batteries, Dry, To Renew 369, 378, 401 Batteries, Gravity, Why Fail 115
Battery Binding Posts, Wire Loop Connections for 449 Battery Cell. Dry, Making 160
Battery Connections, Wire Terminals for 168 Battery, Grenet, How to Make 83
Battery Motor, Controller and Reverse for 72 Battery Motor, Reversing 405
Battery, Non-Polarizing, How to Make 151 Battery Rheostat 80, 445
Battery, Small Storage, How to Make 121 Battery Switch 99
Battery, Thermo-Electric, How to Make 59, 140 Battery Voltmeter 153
Battery Zincs, Old, To Use 87
Bed Warmer. Electric, How to Make 338 Beeswax, Substitute for 129
Bell, Cracked, Restoring Tone to 71 Bell, Return Call, with One Wire 101
Bell Ring Register 316
Bell, Ringing by Touching a Gas Jet 403 Belt, Eyelets for 432
Belt Lace Caution 239
Belt, Round, To Make without Ends 243 Bench Lathe Made of Pipe Fittings 316
Bicycle Catamaran 145
Bicycle Coasting Sled, How to Make 231 Bicycle Frame, Enameling 385
Bicycle, Runners on 157
Bicycle, To Attach a Sail to 425
Bicycle, Trailer for 397
Bicycle Trouser Guards for Sleeve Bands 283 Bicycle. Water, How to Make 335
Bill File Made of Corkscrews 315
Bind Magazines, To 40, 56, 406
Bird House, Proper Design for 201
Bird Houses, Clay Flower Pots Used for 277 Bit, Gouge Used as 411
Blotter Pad, Corner Pieces for 8
Blotting Pad, Desk 17
Blowpipe, Homemade 428
Blueprint Lantern Slides, How to Make 120 Blues, prussian and Chinese 401
Boards, Joining 268
Boat-Bicycle Catamaran 145
Boat-Canoe, How to Make 451
Boat-Catamaran, Cruising 423
Boat, Ice, How to Build 357, 382
Boat, Paddle, How to Make 100
Boat, Paper, How to Make 321
Boat-Punt, Homemade 123
Bobsled, Homemade Yankee 408
Bolts, Rusted 151
Book Cover, Paper, How to Make 126
Book Holder 32
Book, Removing Grease Stains from 230 Book Rest 292
Bookcase Doors, To Keep Closed 377 Bookmark 379
Bookmark, Brass 18
Bookmark, Paper Clip 241
Books. How to Carry 409
Boomerangs, How to Make 4, 202
Bore a Square Hole, How to 179
Boring Holes In Cork 8
Bottle, Cutting Thread inside of 179 Bottle, Diving 331
Bottle, Inverted, Withdrawing Paper from Under 33 Bottle, Photographing Man in 74
Bottle Pushing on the Ice 409
Bottles, Round End. Base for 29
Bottle Stopper, New Way to Remove 224 Bowl, Copper, How to Make 185
Box Cover. Sliding, Fastener 256
Box, Fishhook 379
Box, Magic 7
Box, Water Color 257
Boxes, Rustic Window 30
Bracket Saw, Cheap, How to Make 42
Brass Bookmark 18
Brass, Cleaning 407
Brass Flag, Ornamental, How to Make 266 Brass Frame In Repousse 237
Brass Furnace, How to Build 115
Brass, Piercing Punch for 19
Brass Plaques, Photo Silhouette, Making 217 Brass Surface, Flat, Polishing 229
Brass Work-Candlestick, How to Make 325 Bread, Loaf, Cutting 36
Bronze Liquid 329
Brooder for Small Chickens 343
Broom Holder 13
Broom Holder Made of a Hinge 33
Broom, Old, Crutch Made of 352
Brush, Counter, for a Shop 419
Brush, To Keep from Spreading 367
Brushes, Paint, Care of 267
Bulb on a Glass Tube, To Make 324
Bunsen Cell, How to Make 206
Burglar Alarm, Simple, How to Make 368 Burning Inscriptions on Trees 45
Burns, Carbolic Acid 126
Button, Changing into a Coin 234
Button. Removing from Child’s Nostril 237 Buttonhole Trick 234
C
Cabinet for Pot Covers 16
Cabinet for Phonograph Records 483
Cabinet, Music, How to Make 77
Cabinet, Phonograph Disk Cabinet 79, 433 Calendar, Handy 196
Calliope, Steam, How to Make 418
Camera, Box, Repairing 379
Camera, Enlarging from Life in 111, 117 Camera, Homemade Kits for 159
Camera, Making Light proof 58
Camera, Practical, for Fifty Cents 365 Camp Stool, How to Make 222
Camp, Tin Drinking Cup for 379
Camper’s Lantern, Makeshift 266
Camps and How to Build Them 341
Camps, Keeping Food Cool in 21
Can Covers, Tool for Lifting 352
Candle Shade, How to Make 191
Candlestick, How to Make 240, 281, 325 Candlestick, Water 406
Cane Chairs, How to 259
Cane in Furniture, Tightening 230
Cannon Balls, 36, Removing from Handbag 256 Cannon, Gas 197
Cannon, How to Make 42
Cannon, Lead, How to Make 338
Cannon, Toy, To Discharge by Electricity 59 Canoe, How to Make 451
Canoe, Sailing, How to Make 199
Cans, Tomato, Irrigating with 450
Canvas Cot, Folding, How to Make 154 Canvas, Waterproofing 146
Carburetor Difficulties 208
Card Trick, Rising 256
Card Trick with a Tapered Deck 70
Cardboard Spiral Turned by Heat 226 Cardboard Squares. Gun for Throwing 269
Cardcase, Lady’s, How to Make 350
Cards, Mechanical Trick with 63
Carpenter’s Gauge 19
Carpenter’s Vise, Homemade 36
Carpet Sweeper Wheels, New Tires for 266 Cart, Dog 60
Cart without an Axle 291
Catamaran, Bicycle 145
Catamaran, Cruising 423
Catapult, Fourth of July 447
Cats, Shocking, Device for 411
Cell, Bunsen 206
Cell, Daniell 252
Centaur. Boys Representing 173
Centering, To Make Unnecessary 319
Chain Made from a Match 377
Chair, Child’s Footrest on 453
Chair Legs. Rubber Tip for 229
Chair, Porch Swing 128
Chair Rockers, Safety Tips on 429
Chair Sleighs 383
Chairs, Balancing on 131
Chairs, To Cane 259
Checker Board Puzzle 189, 233
Cheese box Cover, Tea Tray 18
Chemicals. Protecting Fingers from 283 Cherry Seeder 29
Chicken Coop. Keeping Rats from 352 Chickens, Drinking Trough for 454
Chickens, Feed Box for 292
Chickens. Small, Brooder for 343
Chisel, Ice 61
Chisel, Steel, Annealing 362
Chopping Board 19
Christmas Tree Decorations, Repairing 11 Churn, Homemade Small 192
Clamp, Magazine, How to Make 435
Clamping a Cork 33
Clamps, Homemade Soldering 137
Cleaner for Gloves 302
Cleaner for White Shoes 239
Cleaning Brass 407
Cleaning Discolored Silver 344
Cleaning Furniture 185
Cleaning, Glass, Solution 31
Cleaning Jewelry 353
Cleaning Leather on Furniture .13
Cleaning Silver 305
Cleaning Walls 375
Cleaning Woodwork 315
Cleats, Insulating, Substitute for 348 Clock, Electric, How to Make 268
Clock, Homemade Novelty 446
Clock, How to Clean 119
Clock, Novelty, for the Kitchen 360 Clock, Old, Use for 367
Clothes Rack 14
Clothesline, Double, Support for 318 Coaster, Roller, Illusion 298
Coaster, Trolley, How to Make 387
Coasters and Chair Sleighs 383
Cock, ‘l’hree Way, for Small Model Work 50 Coil. Jump Spark 113
Coils, Forming to Make Flexible Wire Connections 443 Coin and Card on the First Finger 175
Coin and Tumbler Trick 378
Coin, Changing Button Into 234
Coin, Disappearing 176, 193
Coin In a Wine Glass Trick 167
Coin, Moving under a Glass 214
Coin Purse, How to Make 354
Coin, Sticking against Wall 176
Coin, Sticking to Wood by Vacuum 287 Coins, Display Rack Shows Both Sides of 220 Coins, Sending by Mail, Safe Method of 287 Compass, Mariner’s 170
Compass Needle, Floating 160
Compass, Substitute for 289
Compressed Air Phenomenon 111
Concrete Kennel 23
Concrete Swimming Pool 178
Conservatory, Window 103
Controller for a Small Motor 42
Cook Fish, One Way to 206
Copper Bowl, How to Make 185
Copper, Hardening 206
Copper Picture Frame, Etched, How to Make 414 Copper Trays, How to Make 180
Copper Work–Corner Pieces for a Blotter Pad 8 Cord. Buttoned 427
Cork, Boring, Holes in 8
Cork, Clamping 33
Cork Extractor 300
Corks, How to Fit 368
Corkscrews, Bill File Made of 315
Corner Pieces for a Blotter Pad, How to Make 8 Cot. Canvas, How to Make 154
Counter Brush for a Shop 419
Crossbow and Arrow Sling, How to Make 339 Crutch. Homemade 369
Crutch Made of an Old Broom 352
Crystallization, Instantaneous 288 Cup and Saucer Rack, How to Make 105
Cup, Tin Drinking, for the Camp 379 Current Reverser 107, 111
Curtain Roller 419
Curtain Roller Spring, How to Tighten 79
D
Dance, Miniature War 255
Darkroom Lantern, Homemade 14, 340 Darkroom, Photographic, Building 26
Demagenetizing a Watch 166
Desk Blotting Pad 17
Developing Box, How to Make 220
Developing Tray, Cracked Composition, To Repair 260 Developing Tray. Photographic 269
Dish Holder, Hot 7
Dogcart, Homemade 160
Dog, How to Chain 257
Dog’s Bark, Drowning with Water 435 Dogs, To Drive Away 106
Door Bell and Electric Alarm 114
Door Lock, Secret 6
Door Opener, Electric 78
Door Opener for a Furnace 83
Door, Sliding, Electric Lock for 89 Dovetail Joint 29
Dovetail Joint Puzzle 236
Draft Opener, Automatic 102
Draftsman. Spline for 406
Draftsmau’s Ink Bottle Cork, Steel Pen Used In 117 Drawers, Several, Locking with One Lock 314 Drawing, Aid In 270
Drawing Instrument-Wondergraph, How to Make 436 Drawing, Landscape, Made Easy 449
Drill Gauge, Handy 252
Drill, Hand, How to Make 444
Drinking Cup, Tin, for the Camp 379 Drinking Trough for Chickens 454
Drip Shield for the Arms 258
Dry Batteries, Another Way to Renew 378 Dry Batteries, Cheap, How to Obtain 410 Dry Batteries, Old, To Renew 401
Dry Batteries, Renewing 367
Dry Battery Cell, How to Make 160
Duplicator for Box Cameras 363
Duplicator, Homemade 240
E
Easel, How to Make 415
Egg-Beater, How to Make 291
Eggshell Funnel 93
Eggshells, How to Preserve 288
Elderberry Huller, Homemade 323
Electric Alarm 94
Electric Alarm, Door Bell and 114
Electric Alarm That Rings a Bell and Turns On a Light 337 Electric Anesthesia 445
Electric Apparatus-Ammeter, How to Make 49, 203 Electric Apparatus-Annunciator, Homemade 57 Electric Apparatus-Annunciator, How to Construct 416 Electric Apparatus-Batteries, Connecting Up to Given Any Voltage 93 Electric Apparatus-Battery Rheostat 80
Electric Apparatus-Battery Voltmeter 153 Electric Apparatus-Bell, Return Call, with One Wire 101 Electric Apparatus-Cats, To Shock 411
Electric Apparatus-Cell, Daniell 252 Electric Apparatus-Circuit Breaker for Induction Coils 101 Electric Apparatus-Controller and Reverse for Battery Motor 72 Electric Apparatus-Controller for a Small Motor 42 Electric Apparatus-Current Reverser 107, 111 Electric Apparatus-Galvanometer, Tangent 150 Electric Apparatus-Induction Coil, How to Make 138 Electric Apparatus-Induction Coils, Mercury Make and Break Connection for 187
Electric Apparatus-Jump Spark Coil 113 Electric Apparatus-Medical Induction Coil, How to Make 63 Electric Apparatus-Motor, Single Phase Induction 124 Electric Apparatus-Motors, Direct Connected Reverse for 60 Electric Apparatus-Rheostat, Lead Pencil 145 Electric Apparatus-Shocking Machine 139 Electric Apparatus-Thermo Battery, How to Make 59 Electric Apparatus-Thermostat, Small 455 Electric Apparatus-Transformer, 110-Volt 439 Electric Apparatus-Voltammeter, Pocket 330 Electric Battery Massage, Homemade 144
Electric Bed Warmer, Homemade 338
Electric Bell, Relay Made from 94
Electric Blue Light Experiment 47
Electric Clock, Homemade 268
Electric Charges, Detector for 281 Electric Door Opener 78
Electric Engine 276
Electric Experiment, Interesting 377 Electric Experiment, Reversing Switch for 92 Electric Fire Alarm, How to Make 430
Electric Furnace Regulator, How to Make 388 Electric Furnace, Small, How to Make 48 Electric Heat Regulator, Automatic 344
Electric Horn, How to Make 218
Electric Hydrogen Generator 54
Electric Illusion Box 135
Electric Indicator for a Wind Vane 348 Electric Lamp Experiment 53, 120, 131
Electric Lamp Sockets, Miniature, How to Make 270 Electric Lamps, Miniature 434
Electric Lamps, Testing 314
Electric Light Circuit, Experiments with 50 Electric Lighting, Miniature 104
Electric Lights, Turned On and off from Different Places 205 Electric Lock 60, 110
Electric Lock for Sliding Door 89
Electric Lock, Simple 60
Electric Locomotive, Miniature, How to Make 165 Electric Motor 401
Electric Motor, Novel 395
Electric Motor, Small 214, 222, 345 Electric Pendant Switch, How to Make 310 Electric Piano, How to Make 247
Electric Plug, Homemade 430
Electric Postcard Projector 195
Electric Rat Exterminator 358
Electric Shock, To Give While Shaking Hands 133 Electric Shocker for Garbage Cans 94
Electric Stove. Homemade 31, 273
Electric Terminals, Varnish for 376 Electric Time Alarm 433
Electric Toaster, How to Make 37
Electric Walking Stick 413
Electric Wires, Flexible, Adjuster for 386 Electricity, To Discharge Toy Cannon by 59 Electricity; To Explode Powder with 53
Electricity, Writing with 74
Electrodeposition, Copies Made from Wax Molds by 157 Electrolytic Rectifier, How to Make 197 Electromagnet, Floating 152
Electroplating, Easy Method of 88
Electroscope, How to Make 103
Electrostatic Illumination 299
Emery Wheel Arbors, Washers for 359 Enameling a Bicycle Frame 385
Engine, Electric 276
Engine, Gasoline, How to Make 207
Engine, Model Steam 1
Engine, Steam, Made from Gas Pipe and Fittings 184 Engine, Toy Steam, How to Make 73
Engine, Turbine, How to Make 355
Equatorial, Homemade 204, 253
Equilibrator for Model Aeroplanes 11 Experiment, Center of Gravity 302
Experiment, Electric 377
Experiment, Electric Blue Light 47 Experiment, Heat and Expansion 124
Experiment, Phonograph 105
Experiment, Telephone 137
Experiment with a Vacuum 439
Experiment with Colored Electric Lamps 53 Experiment with Heat 134
Experiment with Incandescent Lamp 427 Experiment with Two Foot Rule and Hammer 106 Experiment, X-Ray 190
Experiments, Electric Lamp 120, 131 Experiments, Electrical, Reversing Switch for 92 Experiments with a Mirror 434
Experiments with Electric Light Circuit 50 Eye, Blind Spot in, To Find 129
Eyeglasses, Holding Firm 315
F
Fan, Wooden, How to Make 332
Faucet Used as an Emergency Plug 343 Feed Box for Chickens 292
File, Chalking 19
File, Sharpening Skates with 306
File Soft Metals, How to 406
Film Washing Trough 331
Films, Drying 412
Films, Frame for Drying 446
Filter, Simple and Effective 278
Filtering with a Small Funnel 25
Finger Mathematics 181
Finger, Removing Tight Fitting Ring from 361 Fingers, Protecting from Chemicals 283
Fire Alarm, Cheap 47
Fire Alarm, Electric, How to Make 430 Fire Alarm, Simple, How to Make 359
Fire Extinguisher, Homemade 351
Fire, Making with the Aid of Ice 338 Fire Screen, How to Make 82
Fire Screen. Leaded Glass 295
Fish Bait 152
Fish, One Way to Cook 206
Fishhook Box 379
Fishing through Ice, Signals for 10, 281, 380 Flag, Brass, How to Make 266
Flatiron Rest 19
Flier, Toy, How to Make 429
Flint Arrowhead, How to Make 23
Floor Polisher, Homemade 10, 350
Flour Sifter 7
Flower, Magic Growing 244
Flower Pot Stand 33
Flower Pots, Clay, Used for Bird Houses 277 Flower Pots, Window Shelf for 292
Flower Stand, Iron 353
Flowers, Cut, To Longer Preserve 419 Flowers, Decoloration of 288
Flush Valve, Repairing a Washer on 344 Fob, Shoestring Watch, How to Weave 285 Fob, Watch, How to Make 12, 223
Food. Keeping Cool in Camps 21
Football, Tying Knot for 133
Footrest, Child’s, on an Ordinary Chair 453 Footwear, Drier for 229
Forks, Balancing on a Pin Head 427 Foundry Work at Home 95
Fountain for an Ordinary Pen 450
Fountain Pen, Ordinary Pen Used as 454 Fountain Pen Used as a Ruler 319
Fountain Pens, Leaking, Remedy for 390 Frame, Brass, in Repousse 237
Frost, To Keep Windows Free from 354 Fuming of Oak 196
Funnel. Eggshell 93
Funnel, Filtering with 25
Funnel, Glass 412
Funnel, Horn Used as 7
Funnel, Temporary 275
Funnel, Venting a 318
Furnace, Brass, How to Build 115
Furnace, Door Opener for 83
Furnace Draft. Alarm Clock to Pull Up 107 Furnace Draft Opener, Automatic 102
Furnace, Electric, How to Make 48
Furnace Regulator, Electric, How to Make 388 Furniture, Cleaning 185
Furniture, Cleaning Leather on 13
Furniture, Drawing of 294
Furniture–Library Set in Pyro-Carving 407 Furniture–Rustic Seat 441
Furnlture–Table, Mission Library, How to Make 141 Furniture, Tightening Cane In 230
G
Galvanometer, Tangent, How to Make 150 Galvanoscope, How to Make 68
Game-Baseball, Playing with a Pocket Knife 250 Game-Bottle Pushers 409
Game, Chinese Outdoor 176
Game Played on the Ice 216
Garbage Can, Keeping Animals Away from 94 Gas Cannon 197
Gas Jet, Ringing a Bell by Touching 403 Gas Jet, Shade Holder Bracket for 419
Gas, To Light without Matches 394
Gasoline Burner for Model Work 55
Gasoline Engine, Homemade 207
Gauge, Carpenter’s 19
Gauge, Drill 252
Gauge, Rain, How to Make 64
Gauntlets on Gloves 266
Gear Cutting Attachment for Small Lathes 167 Gear for Model Work 225
Gear Wheels, Small, To Make without a Lathe 46 Geissler Tuhe, How to Make 154
Glass Blowing and Forming 420
Glass Cleaning Solution 31
Glass, Effect of Radium on 116
Glass, Emergency Magnifying 305
Glass, Fire Screen, Leaded 295
Glass Funnel, Emergency 412
Glass, Ground, Imitating 294
Glass, Ground, Substitute 255
Glass Letters, Removing from Windows 319 Glass, Magnifying, How to Make 397
Glass, Photograph Prints Mounted on 231 Glass Plates, Piercing with a Spark Coil 426 Glass Tube, To Make a Bulb on 324
Gilder, How to Make 171
Gloves, Cleaner for 302
Gloves, Gauntlets on 266
Gold Leaf, Covering Signals with 189 Gouge Used as a Bit 411
Gramophone Records, Cracked, Repairing 24 Grape Arbor, How to Build 73
Gravity Batteries, Why Fail 115
Gravity Experiment 302
Grease Stains, Removing from Book 230 Grease, To Remove from Machinery 216
Greasing the Front Wheels of an Automobile 320 Grills, Rope, How to Make 277
Ground Glass, Imitating 294
Guitar That Is Easy to Make 320
Gummed Paper, Substitute for 315
Gun Barrels, Bursting of 304
Gun, Toy, for Throwing Cardboard Squares 269 Gymnasium. Outdoor:
Part I-The Horizontal Bar 298
Part II-Parallel Bars 301
Part III-The Horse 303
H
Hacksaw Blade, Knife Made from 293 Hammock, Barrel Stave 75
Hammock, How to Make 410
Hand Car Made of Pipe and Fittings 440 Hand, Magic Spirit 2
Handbag, Ladies’, How to Make 213
Handbag, Removing 36 Cannon Balls from 256 Handkerchlef Mended after Being Cut and Torn 198 Handkerchief Trick, Vanishing 319
Handle, Opengng, for a Stamp Pad 23 Handle, Tying Paper Bag to Make 10
Hanger, Trousers, How to Make 143, 369 Hangers, Tool 453
Hardening Copper 206
Harmonograph, Line 34
Hat. To Hang on a Lead Pencil 133
Hatpins, Sealing Wax, How to Make 175 Hats, Felt, Packing Cut from 207
Heat and Expansion 124
Heat, Cardboard Spiral Turned by 226 Heat, Experiment with 134
Heat Regulator, Electric 344
Hectograph, Homemade 240, 326
Hinge, Broom Holder Made of 33
Hinges, Imitation Fancy Wings on 224 Hinges, Leather, Metal Covering for 41
Hole, Square, How to Bore 179
Hole, Threaded, Sizing 295
Holes, Boring In Cork 8
Holes, Circular. Cutting In Thin Sheet Metal 35 Holes, Different Shaped, Fitting Plug in 122 Horn, Electric, How to Make 218
Horn, Paper Phonograph, How to Make 71 Horn Used as Funnel 7
Horsepower of Small Motors, Finding 238 House, Building In a Tree Top 146
Hydrogen Generator, Constant Pressure 70 Hydrogen Generator, Small Electrical 54 Hygrometer, How to Make 71, 140
I
Ice Boat, How to Build 357
Ice Boating 382
Ice, Bottle Pushing on 409
Ice Chisel, Handy 61
Ice, Fish Signal for Fishing through 10 Ice, Fishing through 281
Ice, Game Played on 216
Ice, Making a Fire with the Aid of 338 Ice, Merry-Go-Round Whirl on 380
Ice, Peculiar Properties of 100
Ice, Signals for Fishing through 380 Ice Skates, Hollow Grinding 231
Ice Yacht. How to Build 307
Illusion, Balloon Ascension 300
Illusion Box, Electric 135
Illusion for Window Attraction 239 Illusion. Miniature “Pepper’s Ghost” 52 Illusion, Roller Coaster 293
Illusion, Rolling Uphill 361
Illusions, Optical 74, 99, 130, 183, 206, 348, 364 Incandescent Lamp, Experiment with 427
Indian Clubs, Weighting 318
Indicator, Electric, for a Wind Vane 348 Induction Call, How to Make 138
Induction Coil, Lighting an Incandescent Lamp with 112 Induction Call, Small Medical, How to Make 63 Induction Coils, Circuit Breaker for 101 Induction Calls. Mercury Make and Break Connections for 187 Induction Motor, Single Phase, How to Make 124 Ink Bottle Cork, Steel Pen Used in 117
Ink Spots, Removing 131
Inkstand, Ornamental Metal 315
Insulating Aluminum Wire 306
Insulating Cleats, Substitute for 348 Insulation, Removing from Wire 213
Interrupter, How to Make 51
Iodine Stains, Removing 425
Iron Castings, Putty for 269
Iron Flower Stand, Ornamental 353
Iron Polisher 286
Iron Rest for an Ironing Board 288 Iron Work, Ornamental, Easy Designs in 370 Ironing Board Stand, How to Make 17, 429 Irrigating with Tomato Cans 450
J
Jelly Making Stand 290
Jewelry, How to Clean 353
Jig Saw Puzzle, Photographic 361
Joint, Dovetail 29
Jump Spark Coil, How to Make 113
K
Kennel, Concrete 23
Kennel Door, Automatic Closing 32
Kerosene, Used in Polishing Metals 364 Kettle, Spoon holder On 24
Kettles, Spoon Rest for 304
Key Forms, Preserving 454
Key, Removing from a Double String 179 Kiln, Pottery 62
Kitchen, Novelty Clock for 360
Kitchen Utensil–Baking Pan 13
Kitchen Utensil–Cherry Seeder 29
Kitchen Utensil–Chopping Board 19 Kitchen Utensil–Egg-Beater, How to Make 291 Kitchen Utensil–Elderberry Huller 323
Kitchen Utensil–Flour Sifter 7
Kitchen Utensil for Removing Pies from Pans 275 Kitchen Utensil–Homemade Toaster 139
Kitchen Utensil–Hot Dish Holder 7 Kitchen Utensil–Hot Plate Lifter 318
Kitchen Utensil–Jelly Making Stand 290 Kitchen Utensil–Knife Sharpener 379
Kitchen Utensil–Ladle and Strainer, Combined 302 Kitchen Utensil–Pot Cover Closet 16
Kitchen Utensil–Pot Covers, Homemade 297 Kitchen Utensil–Querl, Versatile 28
Kitchen Utensil–Salad Dressing Mixer 16 Kitchen Utensil–Spoon Rest for Kettles 24, 304 Kitchen Utensil–Tool for Lifting Can Covers 352 Kitchen Utensil–Vegetable Slicer 413
Kite Balancing Strings, Rubber Bands in 270 Kite, Box, How to Make 58
Kite, Chinese, How to Make and Fly 210 Kite Reel. Homemade 156
Kite, Tailless 458
Kites of Many Kinds and How to Make Them 391 Knife Blade, Worn, Repairing 228
Knife Made from Hacksaw Blade 293
Knife, Pocket, Playing Baseball with 250 Knife Sharpener, Kitchen 379
Knot, Magic 198
Knot Trick 167
Knot, Tying for Football 133
L
Ladle and Strainer, Combined 302
Ladle, Babbitt 264
Ladle for Melting Babbitt 173
Lamp, Acetylene, Lighting 401
Lamp, Arc 132
Lamp Cord, Flexible, Holder for 317 Lamp Cords, Flexible, Clasp for Holding 267 Lamp, Flash, How to Make 174
Lamp, Homemade Pocket 149
Lamp, Incandescent, Experiment with 427 Lamp, Incandescent, Lighting with an Induction Coil 112 Lamp, Quickly Made 329
Lamp Sockets, Miniature Electric. How to Make 270 Lamp Stand and Shade, How to Make 147
Lamps, Electric, Testing 314
Lamps, Miniature Electric 434
Lamps, To Make Burn Brightly 364
Lantern, Camper’s Makeshift 266
Lantern, Darkroom, How to Make 14, 340 Lantern, Homemade 163
Lantern, Magic, How to Make 328
Lantern, Magic, Using Sun’s Light in 251 Lantern Slide Masks, Cutting 245
Lantern Slides, Blueprint, How to Make 120 Lantern Slides, How to Make 127, 220
Lantern Slides, Tinted, How to Make 144 Lathe, Bench, Made of Pipe Fittings 316 Lathe, How to Make 86
Lathe, Making Gear Wheels without 46 Lathe, Wood Turning, To Make Out of an Old Sewing Machine 403 Lathe Work, Calipering 258
Lathes, Small, Gear Cutting Attachment for 167 Laundry Device–Clothes Rack 14
Laundry Device–Clothesline, Double, Support for 318 Laundry Device–Iron Rest 19
Laundry Device–Iron Rest for an Ironing Board 288 Laundry Device–Ironing Board Stand 17, 429 Laundry Device–Sad Iron Polisher 286
Laundry Device–Washboard Holder 39 Lavatories, Sleeve Holders for 17
Lead Cannon, How to Make 338
Lead, Melting in Tissue Paper 185
Lead Pencil Rheostat, How to Make 145 Leaf, Photograph Printed on 362
Leather Card case, How to Make 350 Leather Hinges, Metal Coverings for 41
Leather on Furniture, Cleaning 13
Leather, Softening 140
Leather Spectacle Case, How to Make 228 Leather, Table Mat of, How to Make 286
Leather Work, Arts and Crafts 168
Letter Holder of Pierced Metal 294 Lettering on a Dark Ground, Paint for 170 Lettering with a Carpenter’s Pencil 306 Letters, Glass, Removing from Windows 319 Levitation-Modern Stage Trick 459
Library Set in Pyro-Carving 407
Life Buoy, How to Make 432
Life preserver, Homemade 4
Light Gas without Matches, To 394
Light, Post or Swinging, Homemade 189 Light Trick, Invisible 251
Lightning Arrester, How to Make 122 Lightning, Photographing 124, 176
Lights, Turning On and Off from any Number of Places 310 Linoleum, How to Repair 273
Liquids-Splashes, Study of 164
Lock, Automatic 106
Lock, Electric 60, 110
Lock, Electric, for a Sliding Door 89 Lock, Homemade Pneumatic 65
Lock, Lubricating 151
Lock, Secret Door 6
Lock, Spring, Protection of 72
Lock, Trunk, How to Attach 134
Lock, Window 397
Locking Several Drawers with One Lock 314 Locomotive, Miniature Electric, How to Make 165 Log, To Cross Stream on 94
Lubricant for Wood Screws 137
Lubricate Sheet Metal, To 69
Lubricating a Lock 151
M
Machinery, To Remove Grease from 216 Magazine Binder, To Make 406
Magazine Clamp, How to Make 435
Magazine, How to Bind 40, 56
Magic Box Escape 7
Magic-Electric Illusion Box 135
Magic Lantern, Homemade 328
Magic, Old Time 167, 175, 176, 179, 193, 198, 234, 244, 251, 256, 427
Magic, Parlor, for Winter Evenings 90 Magic Spirit Hand 2
Magic-Violin, Making Spirits Play 295 Magnet for the Work Basket 292
Magnifying Glass, Emergency 305
Magnifying Glass, Homemade 397
Mahogany, Filler for 139
Mail Photographs, How to 312
Mail, Sending Coins by 287
Marble, Rolling 191
Massage, Electric Battery 144
Mat, Wrestling 330
Match, Chain Made from 311
Match Holder of Wood and Metal. How to Make 282 Match, How to Relight 444
Match Safe, Homemade 194
Mathematics, Finger 181
Mattresses, Handling 19
Measuring the Height of a Tree 376 Medical Induction Coil, How to Make 63
Mercury Make and Break Connections for Induction Coils 187 Merry-Go-Round, How to Build 359
Merry-Go-Round Swing. How to Make 131 Merry-Go-Round Thriller 209
Merry-Go-Round Whirl on Ice 380
Metal Coverings for Leather Hinges 41 Metal Inkstand, Ornamental 315
Metal, Melting in the Flame of a Match 449 Metal, Pierced, Letter Holder of 294
Metal, Sheet, Sawing 291
Metal, Sheet, To Lubricate 69
Metal, Thin Sheet, Cutting Circular Holes in 35 Metal Whisk Broom Holder 221
Metals, Soft, How to File 406
Metals, Use of Kerosene In Polishing 364 Mice and Rats, Killing 293
Micrometer, Homemade 130
Microscope, Homemade 433
Microscope, Small, How to Make 408
Microscope without a Lens 76
Minnow Trap, How to Make 390
Mirror, Experiments with 434
Model Aeroplanes. Equilibrator for 11 Model Steam Engine 1
Model, Steamboat 216
Model Work, Gasoline Burner for 55 Model Work, Gear for 225
Model Work, Three Way Cock for 50
Mold, Removing from Wallpaper 320
Monoplane Weather Vane 390
Moon, New, photographing 174
Motor, Battery, Controller and Reverse for 72 Motor, Battery, Reversing 405
Motor, Electric 214, 345, 395. 401 Motor, Reversing 105
Motor, Single Phase Induction 124
Motor, Small, Controller for 42
Motor, Small, How to Make 428
Motor, Water 66, 311
Motorcycle Drives Washing Machine 219 Motors, Small, Finding Horsepower of 238 Mouse Trap 112, 198, 293, 395, 450
Music Cabinet, How to Make 77
Music, Furnace, To Transmit to a Distance 107
N
Nail Holes, Filling 85
Nail, To Hang Heavy Things on 323
Nails, Iron Shingle, Life of 244
Necktie Holder, Homemade 369
Negatives. Broken, Restoring 377
Nickel, Polish for 112
Nostril, Child’s, Removing Button from 237 Nut Cracking Block 290
Nuts, Tightening 155
Nutshell Photograph Novelty 24
O
Oak, Fuming of 196
Optical Illusion 74, 99, 130, 183, 206, 348, 364 Optical Top 69
Ornaments, Christmas Tree, Repairing 11
P
Packing, Cut from Felt Hats 207
Paint Brushes, Care of 267
Paint, Cause of Sagging 340
Paint for Lettering on a Dark Ground 170 Paint, Old, Removing 396
Paint, Sealing Up 363
Painting an Automobile 357
Painting Over Putty 136
Painting Yellow Pine 151
Paints, To Prevent from Crawling 55 Paints–Water Color Box 257
Pan, Baking 13
Paper Aeroplane, How to Make 329
Paper Bag, Tying to Make a Handle 10 Paper Bags, Use for 19
Paper Boat, How to Make 321
Paper, Gummed, Substitute for 315
Paper, Smoothing after Erasing 29
Paper, To Remove from Stamps 234
Paper under an Inverted Bottle, Withdrawing 33 Parachutes and Darts, Toy 352
Paraffin Wire, How to 161
Pen, Fountain, Ordinary Pen used as 450, 454 Pen, Fountain, Used as a Ruler 319
Pen, Steel, Used in Ink Bottle Cork 117 Pencil, Carpenter’s, Lettering with 306 Pens, Corrosion of, Preventing 257
Pens, Leaking Fountain, Remedy for 390 “Pepper’s Ghost” Illusion, Miniature 52 Percolator, Plant Food 258
Perfume Making Outfit 363
Phoneidoscope 407
Phonograph Experiment 105
Phonograph, Homemade 289
Phonograph Horn, Paper, How to Make 71 Phonograph Music, To Transmit to a Distance 107 Phonograph Record Cabinet 79, 433
Phonograph Reproducer, Relieving Weight of 245 Phonograph Spring. Broken, Repairing 316 Phonograph, Steadying 214
Phonograph, Thorns Used as Needles on 453 Photograph Letters, Spelling Names with 232 Photograph Mounts, Rough AIligator 424
Photograph Novelty, Nutshell 24
Photograph of a Clown Face 180
Photograph Postcards, Drying 453
Photograph Print Washing Tank 136
Photograph Printed on a Leaf 362
Photograph Prints, Drying Flat 38
Photograph Prints, Drying Without Curling 425 Photograph Prints, Mounting on Glass 231 Photograph Prints, Stretcher for Drying 275 Photographic Jig-Saw Puzzle 361
Photographing a Man in a Bottle 74 Photographing Lightning 124, 176
Photographing the New Moon 174
Photographing the North Star 443
Photographs, Freak, Making of 110, 440 Photographs, How to Mail 312
Photographs in Relief Easily Made 431 Photographs, Mounting in Plaster Plaques 287 Photographs on Watch Dials, Making 386
Photographs. To Print on Silk 396
Photography–Background Frame, Take Down, How to Make 156 Photography–Changing Bag for Plate Holders 212 Photography–Copying Stand 149
Photography–Darkroom Lantern, How to Make 340 Photography–Darkroom, Small, Building 26 Photography–Developing Box, How to Make 220 Photography–Developing Tray 269
Photography–Developing Tray, Cracked, Repairing 260 Photography–Duplicator for Box Cameras 363 Photography–Enlarging from Life in the Camera 111, 117 Photography–Film Negatives, How to Keep 194 Photography–Film Washing Trough 331
Photography–Films, Drying 412
Photography–Films, Frame for Drying 446 Photography-Green Prints, Paper That Makes 157 Photography-Kits for the Camera 159
Photography-Negative Washer, Adjustable, How to Make 143 Photography-Negatives, Broken, Restoring 377 Photography-Paper Stuck to Negative, To Remove 250 Photography-Pictures, Four, on One Plate 46 Photography-Printing Frame Stand 123
Photography-Prints, Overexposed Developing, Saving 16 Photography-Proofs, Making before Negative Dries 33 Photography-Ray Filter, Substitute for 120 Photography-Toning Blue On Bromide and Platinum 31 Photography-Tripod Holder, Homemade 284 Piano, Electric, How to Make 247
Picture Frame, Etched Copper, How to Make 414 Pies, Removing from Pans 275
Pin Ball, How to Make 314
Pine, Yellow, Painting 151
Pipe and Fittings, Hand Car Made of 440 Pipe and Fittings, Hand Sled Made of 305 Pipe Fittings, Bench Lathe Made of 316
Pipe Fittings, Uses for 61
Pipe, Gas, and Fittings, Steam Engine Made from 184 Pipe Rack, Bent Iron 305
Planing Octagonal Wood Pieces, Block for 293 Plant Food Percolator 258
Plaques, Photo Silhouette Brass 217 Plaques, Plaster, Mounting Photos in 287 Plaster of Paris, How to Mix 110
Plaster, Porous, Removing 41
Plate Lifter, Hot 318
Plug, Electric, How to Make 430
Plug, Emergency, Faucet Used as 343 Plug, Fitting in Different Shaped Holes 122 Plumb-Bob Line, Adjusting 229
Pocket Lamp, Homemade 149
Pockets for Spools of Thread 13
Polish, Aluminum 428
Polish for Nickel 112
Polish, Stove 133, 252
Polisher, Floor 10, 350
Polishing Cloths for Silver 32
Polishing Flat Surfaces 229
Polishing Metals, Use of Kerosene in 364 Porch Swing Chair 128
Portfolio, How to Make 225
Portieres, Japanese, How to Make 265 Postcar Holder, How to Make 363
Postcard Projector, Electric 195
Postcard Rack 25
Postcards, Photograph 453
Postcards, Unreadable, Key Card for Writing 35 Pot Cover, Closet 16
Pot Covers, Homemade 297
Pottery Kiln, Homemade 62
Poultry, Feed Box for 292
Poultry Feeder, Alarm Clock 79
Powder, to Explode with Electricity 53 Propelling Vehicle, How to Make 402
Pulley, Grooved, Made from Sheet Tin 412 Pump, Rotary, How to Make 81
Punch. Piercing, for Brass 19
Punching Bag Platform, Adjustable 267 Punt, Homemade 123
Purse, Coin, How to Make 354
Putty, Blacking 376
Putty for Iron Castings 269
Putty Grinder 191
Putty, Painting over 136
Putty, To Preserve 121
Puzzle, Checker Board 189, 233
Puzzle, Dovetail Joint 236
Puzzle, Photographic Jig Saw 361
Puzzle, Wire 378
Pyro-Carving, Library Set in 407
Q
Quartz Electrodes Used in Receiving Wireless Messages 170 Querl, Versatile 28
Quilting Frames, Folding 258
R
Rabbit Trap, Homemade 233
Rabbit Trap, Self Setting, How to Make 158 Rabbits, Trap for 395
Rack, Bent Iron Pipe 305
Rack, Clothes 14
Rack, Cup and Saucer 105
Rack for Displaying Coins 220
Rack, Postcard 25
Rack, Shoe 146
Radium Affects Glass 116
Rain Gauge, How to Make 64
Rat Exterminator, Electric 358
Rat Traps 290, 395
Rats and Mice, Killing 293
Rats, Keeping from a Chicken Coop 352 Ray Filter, Substitute for 120
Reel, Kite 156
Relay Made from an Electric Bell 94 Rheostat, Battery 80, 445
Rheostat, Lead Pencil, How to Make 145 Rheostat, Water 78
Rheostat, Water, How to Make 43
Ring, Finger, How to Make 39
Ring, Tight Fitting, Removing from Finger 361 Roller Coaster Illusion 293
Roller Skates, Homemade 386
Rope Grills, How to Make 277
Rubber Bands in Kite Balancing Strings 270 Rubber Stamps, How to Make 393
Rubber Tip for Chair Legs 229
Rule and Hammer, Experiment with 106 Ruler, Fountain Pen Used as 319
S
Sack Trick 251
Sail, To Attach to a Bicycle 425
Sailomobile, How to Make 326, 415
Sails, Boat, Revolving a Wheel with 152 Sails for Skaters 381
Salad Dressing, Aid in Mixing 16
Sandpaper, To Keep from Slipping 376 Saw, Bracket, How to Make 42
Saw, Homemade Scroll 11
Sawing Sheet Metal 389
Scissors, Removing from a Card 175 Scissors, Sharpening 419
Sconce, How to Make 325
Scoop, Shot 230
Screen, Fire, How to Make 82
Screw, Tightening with Lead 233
Screws, Inserting in Hardwood 318
Screws, Wood, Lubricant for 137
Sealing Wax Bent While Cold 61
Sealing Wax Hatpins, How to Make 175 Seals, Clear Wax Impressions from 450
Searchlight, Self Lighting Arc 9
Searchlight, Small, How to Make 336 Seat, Rustic 441
Settee, Homemade 385
Sewing Bag, How to Make 386
Sewing Machine, Old Wood Turning Lathe Made Out of 403 Screw, To Hold on a Screwdriver 337
Scroll Saw, Homemade 11
Shade, Candle, How to Make 191
Shade, Fastening to a Roller 413
Shade Holder Bracket for a Gas Jet 419 Shaving Mug, Traveler’s 9
Shelf Arrangement, Convenient 413
Shelf, Mission Bracket 39
Shelf, Turn Down, for a Small Space 144 Shelf, Window, for Flower Pots 292
Shellac Gum, Dissolving 124
Shocking Machine, Homemade 139
Shoe Horn, Substitute 25
Shoe Rack, Homemade 146
Shoe Scraper 413
Shoes, Skating, How to Make 158
Shoes, White, Cleaner for 239
Shoestring Watch Fob, How to Weave 285 Shot Scoop 230
Shower Bath, Homemade 15
Signals, Covering with Gold Leaf 189 Signals for Fishing Through Ice 10, 380 Silhouette Brass Plaques, Making 217
Silhouettes, How to Make 68
Silk, To Print Photographs on 396
Silver, Cleaning 305, 344
Silver Plating Outfit, Small, To Make 360 Silver, Polishing Cloths for 32
Sink or Bathtub Stopper, Substitute 429 Sizing a Threaded Hole 295
Skate Sharpener, Pocket, How to Make 166 Skater, Winged 381
Skates, Ice, Hollow Grinding 231
Skates, Roller, How to Make 386
Skates, Sharpening with a File 306 Skating Shoes, How to Make 158
Ski, Norwegian 384
Skidoo-Skidee Trick, Scientific Explanation of 162 Skis and Ski-Toboggans, Making 3
Sled, Barrel Stave 383
Sled, Bicycle 157
Sled, Bicycle Coasting, How to Make 231 Sled, Hand, Made of Pipe and Fittings 305 Sled, Toboggan, How to Make 44, 384
Sled, Yankee 408
Sleds, Coaster, Rocker Blocks on 223 Sleeve Bands, Bicycle Trouser Guards as 283 Sleeve Holders for Lavatories 17
Sleigh, Chair 383
Sleigh, Running 381
Sling, Crossbow and Arrow, How to Make 339 Snow House, Eskimo, How to Make 5
Snowshoes, Homemade 9
Solder with Low Melting Point 421
Soldering Clamps, Homemade 137
Soldering for the Amateur 38
Soldering Tool, Emergency 28
Spark Coil, Piercing Glass Plates with 426 Spectacle Case, Leather, How to Make 228 Spit Turned by Water Power 102
Splashes, Study of 164
Spine for Draftsman 406
Spoon Rest for Kettles 24, 304
Sport-Skis and Ski-Toboggans, Making 3 Sports, Winter, Devices of 380
Spring Board for Swimmers 237
Spring, Curtain Roller, How to Tighten 79 Sprocket Wheels, Small, To Make 15
Stage, Miniature, How to Make 159
Stains, Iodine, Removing 425
Stains on Book Leaves, Removing 31 Stamp Pad, Handle for Opening 23
Stamps, To Remove Paper from 234
Star, North, Photographing 443
Static Machine, How to Make 177
Steam Calliope, How to Make 418
Steam Engine Made from Gas Pipe and Fittings 184 Steam Engine, Model 1
Steam Engine, Toy, How to Make 73
Steam Turbine, Homemade 20
Steamboat Model, Simple 216
Steel, Chisel, Annealing 362
Steering Wheel, Heated 441
Stereograph, Principles of 186
Stick Pin, How to Make 164
Still, Homemade 426
Still, Simple, How to Make 170
Stool, Camp, How to Make 222
Storage Battery, Small, How to Make 121 Stove, Electric, How to Make 31, 273
Stove Polish 133, 252
Stovepipe, Cleaner for 230
Stoves, Cleaning 155
Strainer and Ladle, Combined 302
Stream, Crossing on a Log 94
Street Car Line, Imitation, How to Build 374 Sundial, How to Lay Out 261
Sunlight, Using in Magic Lantern 251 Swimmers, Spring Board for 237
Swimming Pool, Concrete 178
Swing and Turning Rings Combined 283 Swing Chair, Porch 128
Swing, Homemade Round 192
Swing, Merry-Go-Round, How to Make 131 Swing Seat, Child’s Homemade 276
Switch, Automatic Time 80
Switch, Battery 99
Switch, Electric Pendant, How to Make 310 Switch, Reversing for Electrical Experiments 92 Switch, Simple, for Reversing a Current 111
T
Table, Lifting 99
Table Mat of Leather, How to Make 286 Table, Mission Library, How to Make 141 Table Pads, Asbestos 212
Talking Machine Reproducer, Relieving Weight of 245 Tank, Small, Aerating Water in 241
Target, Illuminated 291
Tarnish, Removing 17
Tea Tray, Cheesebox Cover 18
Teeter Board, Revolving 297
Telegraph and Telephone Line, Combination 332 Telegraph Codes 422
Telegraph Instrument and Buzzer, How to Make 334 Telegraph Key and Sounder, How to Make 76 Telegraph Key, Homemade 21, 283
Telegraph Line, One Wire 78
Telegraph, Line, Simple Open Circuit 59 Telephone and Telegraph Line, Combination 332 Telephone Experiment 137
Telephone Receiver, Homemade 55, 353 Telephone, Receiving Wireless Telegraph Messages with 92 Telephone, Singing 75
Telephone Transmitter, Homemade 398 Telephone, Wireless, How to Make 432
Telescope, How to Make 108
Telescope Stand and Holder 218
Telescope, Water, How to Make 410
Tent, Bell, How to Make 190
Tent, Lawn, Quickly Made 398
Tents, Weatherproofing for 389
Thermo Battery, How to Make 59
Thermo-Electric Battery, How to Make 140 Thermometer, Air 152
Thermometer Back in Etched Copper. To Make 246 Thermostat. Small, How to Construct 455 Thorns Used as Needles In a Phonograph 453 Thread, Cutting Inside Glass Bottle 179 Thread Spools, Pockets for 13
Time Alarm, Electric 433
Time Switch, Automatic 80
Tin, Sheet, Grooved Pulley Made from 412 Tinware, Rustproof 347
Tire Repair, Emergency 33
Toaster, Electric, How to Make 37
Toaster, Homemade 139
Toboggan Sled, How to Make 44, 384 Toboggans and Skis, Making 3
Tool, Cutting Point of 278
Tool for Lifting Can Covers 352
Tool Hangers 453
Tool, Soldering 28
Top, Austrian 12
Top, Optical 69
Toy, Child’s Rolling, How to Make 224 Toy Darts and Parachutes 352
Toy Flier, How to Make 429
Toy-Skidoo-Skidee, Scientific Explanation of 162 Trailer for a Bicycle 397
Transformer, 110-Volt. How to Make 439 Trap for Rabbits, Rats and Mice, How to Make 395 Trap for Small Animals 82
Trap, Minnow, How to Make 390
Trap, Mouse 112, 198, 450
Trap, Rabbit 233
Trap, Rat 290
Trap, Self Setting, How to Make 158 Trays, Copper. How to Make 180
Tree, Measuring the Height of 376
Tree Top, Building House in 146
Trees, Burning Inscriptions on 45
Trick, Balancing on Chairs 131
Trick, Bottle, Diving 331
Trick, Buttonhole 234
Trick, Cannon Balls, 36, Removing from Handbag 256 Trick, Card. with Tapered Deck 70
Trick, Coin and Card on the First Finger 175 Trick, Coin and Tumbler 378
Trick–Coin, Changing into a Button 234 Trick–Coin, Disappearing 176, 193
Trick–Coin, Moving Under a Glass 214 Trick–Coin, Sticking against Wall 176
Trick–Coins, Dropping in a Glass Full of Water 231 Trick–Coins, Making Stick to Wood 287
Trick–Cord, Buttoned 427
Trick–Electric Illusion Box 135
Trick–Electric Shock, To Give While Shaking Hands 133 Trick–Flowers, Growing 244
Trick–Forks. Balancing on a Pin Head 427 Trick–Handkerchief Mended after Being Cut and Torn 198 Trick–Hat, To Hang on a Lead Pencil 133 Trick–Key, Removing from a Double String 179 Trick, Knot 167
Trick–Knot. Magic 198
Trick–Light, Invisible 251
Trick–Magic Box Escape 7
Trick–Magic Spirit Hand 2
Trick–Marble, Rolling 197
Trick, Mechanical, with Cards 63
Trick–Miniature “Pepper’s Ghost” Illusion 52 Trick–Optical Illusions 74
Trick-Paper, Withdrawing from Under an Inverted Bottle 33 Trick-Photograph of a Clown Face 180
Trick, Rising Card 256
Trick, Sack 251
Trick–Scissors. Removing from Card 175 Trick, Skldoo-Skldee 116
Trick, Stage-Levitation 459
Trick-Table, Lifting 99
Trick-Thread, Cutting Inside a Glass Bottle 179 Trick, Vanishing Handkerchief 319
Trick-Violin, Making Spirits Play 295 Trick, Watch 313
Trick, Water and Wine 244
Trick with a Coin in a Wine Glass 167 Tripod Holder, Homemade 284
Trolley Coaster, Homemade Overhead 387 Trousers, Hanger for 143, 369
Trunk Lock. Combination, How to Attach 134 Turbine Engine, How to Make 355
Turbine, Steam 20
Turning Rings and Swing, Combined 283 Turpentine In Cutting Oil 302
Typewriter Ribbons, Renewing 454
V
Vacuum Cleaner, New Use for 25
Vacuum, Experiment with 439
Valve, Flush, Repairing a Washer on 344 Varnish for Electric Terminals 375
Vegetables, Preventing Burning in a Pot 14 Vegetable Slicer 413
Vehicle-Automobile, Boy’s Homemade 430 Vehicle-Hand Car Made of Pipe and Fittings 440 Vehicle, Propelling, How to Make 402
Vehicle-Wind Propeller, How to Make 415 Violin, Making Spirits Play 295
Vise, Carpenter’s Homemade 36
Vise. Hand. How to Make 201, 211, 226, 280, 340 Volcano. Miniature. How to Make 448
Voltammeter, Pocket 330
Voltmeter, Battery 153
Vulcanizing Press for Rubber Stamps 394
W
Walking Stick. Electric 413
Wall, Cleaning 375
Wall, Waterproofing 229
Wallpaper, Moldy, Cleaning 320
War Dance, Miniature 255
Washboard Holder 39
Washer on a Flush Valve, Repairing 344 Washers for Emery Wheel Arbors 359
Washing Machine, Driving with Motorcycle Power 219 Watch, Demagnetizing 166
Watch Dial. Illuminating at Night 149 Watch Dials, Making Photographs on 386
Watch Fob, How to Make 12, 223
Watch Fob, Shoestring, How to Weave 285 Watch Trick, Mystifying 313
Water, Aerating In Small Tank 241
Water and Wine Trick 244
Water Bicycle, How to Make 335
Water Candlestick 406
Water Colors, To Prevent from Crawling 54 Water, Drowning a Dog’s Bark with 435
Water. Freezing in Pipes 409
Water Motor, Homemade 66, 311
Water Power, Spit Turned by 102
Waterproofing a Wall 229
Water Rheostat 43, 78
Water Supply, Cost of 435
Water Telescope. How to Make 410
Water Wheel Does Family Washing 129 Water Wheel, How to Make 374
Water Wings, How to Make 202
Wax Impressions from Seals 450
Wax Molds, Copies Made by Electrodeposltion 157 Weather Vane, Monoplane 390
Weatherproofing for Tents 389
Weights for Athletes, How to Make 274 Wheel, Revolving with Boat Sails 152
Wheels, Front, of an Automobile, Greasing 320 Wheels, Sprocket, To Make 15
Whisk Broom Holder, Sheet Metal 221 Wind Propeller, How to Make 415
Wind Vane, Electric Indicator for 348 Windmill for Practical Purposes, How to Make 399 Windmill, Miniature, How to Make 333
Windmill, Musical 74
Windmill, Stationary, How to Make 445 Window Attraction–Fish and Birds Illusion 239 Window Boxes, Rustic 30
Window Conservatory 103
Window Display 22
Window Lock 397
Window Shade, Fastening to a Roller 413 Window Shade, Repair for 229
Window Shelf for Flower Pots 292
Window Stick 450
Windows, Removing Glass Letters from 319 Windows, To Keep Free from Frost 354
Wings, Water, How to Make 202
Winter Sports, Devices of 380
Wire, Aluminum, Insulating 306
Wire Connections, Flexible, Forming Coils to Make 443 Wire Loop Connections for Battery Binding Posts 449 Wire, Paraffin, How to 161
Wire Puzzle 378
Wire, Removing Insulation from 213 Wire Terminals for Battery Connections 168 Wireless Coherer, Easily Made 77
Wireless Messages, Quartz Electrodes Used In Receiving 170 Wireless Systems, Simple 54
Wireless Telegraph, How to Make 84, 121 Wireless Telegraph Messages, To Receive with a Telephone 92 Wireless Telegraph, Short Distance 102
Wireless Telephone, How to Make 432 Wires, Drawing Into Fixtures 13
Wires, Flexible Electric, Adjuster for 386 Wondergraph, How to Make 436
Wood Pieces, Octagonal Wood, Block for 293 Wood, Staining 221
Woodwork, Cleaning 315
Work Basket, Homemade 22
Work Basket, Magnet for 292
Workbench for the Amateur 226
Workbench, Homemade 442
Wrestling Mat 330
Writing with Electricity 74
X
X-Ray Experiment 190
X-Ray Instrument, Homemade 151
Y
Yacht, Ice, How to Build 307
Z
Zincs, Old Battery, To Use 87