American Optical Company

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CHEMISTRY

SPENCER PHASE MICROSCOPY

PROVES MORE VERSATILE

A comprehensive study of 72 phase micro­ scope applications, based on extensive re­ search in cooperation with some of the nation's leading scientists, discloses1N 4 1 DIFFERENT APPLICATIONS B r i g h t Contrast O b j e c t i v e s , i n either l o w , m e d i u m , o r h i g h , g i v e best results. (AVAILABLE FROM AO ONLY) IN 1 0 DIFFERENT APPLICATIONS D a r k Contrast, M e d i u m O b j e c t i v e s g i v e best results. (AVAILABLE FROM AO AND OTHERS) IN 9 DIFFERENT APPLICATIONS Β M i n u s C o n ­ trast O b j e c t i v e s , i n e i t h e r l o w , m e d i u m , o r h i g h , g i v e best results. (AVAILABLE FROM AO ONLY) IN 2 DIFFERENT APPLICATIONS D a r k Contrast, L o w O b j e c t i v e s g i v e best results. (AVAILABLE FROM AO ONLY) IN 1 0 DIFFERENT APPLICATIONS B r i g h t o r D a r k Contrast g i v e equally g o o d results.

Here is up-to-the-minute evidence of the need for a wide variety of objectives to cover, the many known applications for Phase Microscopy. The American Optical Company, alone in the world today, offers this variety from regular production. That is why there are many materials in which significant details can be seen only with Spencer Phase Microscopes. They are the logical choice for your laboratory. American Optical Company, Scientific Instrument Division B U F F A L O 15, NEW YORK

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