SCIENCE 



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21 



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Vol. XLVI. No. 1191 



Friday, October 26, 1917 



BmoLz Copisg, 15 Ctb. 

 Annual SOBaoRiPTiON, 85.00 



^ausch lomb 



Microscope FS 2 



$34.00 



Model FS is built to withstand the 

 rough usage of the laboratory. It has 

 the new, crystal black finish which does 

 not mar or show finger-marks like the 

 smooth lacquer. The long curved arm 

 leaves the stage entirely free for manip- 

 ulation of the specimen ; the rounded 

 edges make for ease of handling and 

 freedom from dust. 



The fine adjustment is of the lever type, which is simple and 

 durable. The fine focusing heads are located on both sides of the 

 arm conveniently in line with the coarse adjustment heads. The 

 fine adjustment ceases to act when the objective touches the slide 

 and positive stops denote the limit of motion. 



Write for Circular 



Bausch ^ Ipmb Optical (5» 



409 ST. PAUL STREET ROCHESTER, N. Y. 



New York Washing^ton Chicago San Francisco 



Leading American Makers of Photographic Lenses, Microscopes, Photomicrographic 



and Projection Apparatus (Balopticons) Stereo^Prism Binoculars and other 



High-Grade Optical Products 



