SCIE 



MBW 8SBIE8 



Vol. XXXVI. No. 921 



Friday, August 23, 1912 



CIHQLE COPIBS, 16 CTB. 



Annual Scbscbiftioh, 16.00 



Science Teachers Appreciate the 

 Advantages of 



which combine the greatest optical effi- 

 ciency with durable mechanical construc- 

 tion and convenient manipulation. 



Our new model F was designed for general 

 laboratory work in schools and colleges of 

 the country. It combines optical efficiency 

 and practical utilit;^ with moderate price. 

 It has a long curved handle arm with a 

 large stage, providing thus unusual space 

 for manipulation of the object. All bear- 

 ings and fine adjustment parts are carefully protected and thoroughly dust-proof. 

 Jimple room for the finger between the edge of the fine adjustment head and the arm. 



Complete Description in circular ISA, which 

 will be sent on request. 



Bausch ^ Ipmb Optical ®. 



The Superior Qualify 

 of Bausch £Lomb len- 

 ses, microscopes, field 

 glasses, projection ap- 

 paratus, engineering 

 and other scientific in- 

 struments is the product 

 of nearlu Sixlu Years' NEW YORK WASHINGTON CHICAGO 



l;;i ' LONDON ROCHESTEa.N.Y. TRANKroRT 



SAN FRANCISCO 



