Fig. 78. The A A Microscope of the Bausch & Lomb Optical Co., with slid-ing tube instead of rack and pinion. This microscope is also furnished with rackand pinion. en n.-] LA BORA TORY MICROSCOPES. 75 … Fig. 79. Becks Star Microscope. 7° LABORATORY MICROSCOPES. {CM. II.
Microscopy
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