The Bausch & Lomb BH Microscope 



has been designed especially for use in schools and 

 colleges and in it we have aimed to produce a very 

 rigid, durable instrument at a moderate price. 



It is of the handle arm type and hence possesses 

 the great advantage of enabling it to be carried with- 

 out injury to the fine adjustment, a point of much im- 

 portance in laboratory work where instruments are 

 continually handled by students. 



The fine adjustment is unusually responsive. The 

 working parts are thoroughly protected from dust. 

 BH 2, with f and i objectives, 1 -inch eye- 

 piece, double nose-piece . . . $33.50 

 BH4, with f and £ objectives, 2-inch and 



1 -inch eye-piece, double nose-piece . 35.00 



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 made and printed publication about that world of wonder 

 and beauty seen by the lens. Send us your name and we 

 will enter your subscription FREE. 



Bausch & Lomb Optical Company 



George N. Saegmuller 

 Washington 

 San Francisco 

 London 

 Frankfort o/M 

 Rochester, N.Y. 



