AMERICAN HAND BOOK OF THE DAGUERREOTYPE GIVING THE MOST APPROVED AND CONVENIENT METHODS FOR PREPARING THE CHEMICALS, AND THE COMBINATIONS USED IN THE ART. CONTAINING THE DAGUERREOTYPE, ELECTROTYPE, AND VARIOUS OTHER PROCESSES EMPLOYED IN TAKINGHELIOGRAPHIC IMPRESSIONS. BY S. D. HUMPHREY FIFTH EDITION NEW YORK: PUBLISHED BY S. D. HUMPHREY 37 LISPENARD STREET 1858 Entered, according
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