THE SCHOOL BOOK OF FORESTRY By CHARLES LATHROP PACK PRESIDENT OF THE AMERICAN TREE ASSOCIATION 1922 THE AUTHOR GRATEFULLY ACKNOWLEDGES INFORMATION AND ASSISTANCE FROM THE WRITINGS AND REPORTS OF COL. W.B. GREELEY, U.S. FORESTER; COL. HENRY S. GRAVES, FORMER U.S. FORESTER; GIFFORD PINCHOT, FORMER U.S. FORESTER; DR. B.E. FERNOW, DR. J.W. TOUMEY, F.W. BESLEY, W.I.