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Formerly B. Westeemann & Co. 

 Established 1848 



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812 BROADWAY, NEW YORK 



SIXTH EDITION. 



THE MICROSCOPE 



and iviic<^oscopi- 

 CrL methods. 



By SIMON HENRY GAGE, Professor of Microscopy, His- 

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 New "York State Veterinary College, Ithaca, N. Y., U.S A. 

 Sixth edition, rewritten, greatly enlarged, and illustrated 

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COMSTOCK PUBLISHING CO., Ithaca, N. Y. 



NEW CATALOGUE. 



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186 pages, 40 splendid engnfarings. Con- 

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Established 1876 



Complete Mineral Catalogue. 



DR. A. E. FOOTE, 1317 Arch Street, Philadelphia, Pa., U. S. A. 



COLLECTIONS OF MINERALS FOR STUDY OR REFERENCE, CABINET SPECIMENS. 



GEMS. 



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THAIJMASITE from West Paterson, N. J., a unique compound of the 

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