SCIENCE 



Niw Series 



Vol. XXXVII. No. 960 



Friday, May 23, 1913 



Single Copies, 15 Cts. 

 Annual Bubsoeiption, $5.00 



The Superior Quality 

 of Bausch SLomb len- 

 ses, microscopes, field 

 glasses, projection ap- 

 paratus, engineering 

 and other scientific 

 instruments, is the pro- 

 duct of nearly Sixty 

 Years of Experience, 



Science teachers in leading 

 colleges and schools endorse 

 the high optical efficiency, 

 durable construction and easy 

 manipulation of 



Rauscn lomD 



icroscopes 



Our new Model F offers many practical and val- 

 uable improvements. Its long curved handle arm 

 with a large stage provides unusual space for object 

 manipulation. Stage is rubber-covered — completely, 

 top, edges and bottom. Ample room is provided 

 between the edge of fine adjustment head and the 

 arm for free play of fingers. 



Price, Model F, $31.50. Special Price to Schools. 



Write today for copy of "School Equipment " Catalog 



Bausch ^Ipmb Optical (o. 



409 ST. PAUL STREIT ROCHESTER, H.Y, 



"'m, 



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