SCIENCE 



Nbw Sekies 



Vol. XXXIX. No. 1000 



Friday, February 27, 1914 



Single Copies, 15 Ctb. 

 Annual Subsoeiption, 8B.00 



The Lever Fine Adjustment 



"T^HE most important part of a 

 microscope, apart from its 

 optical system, is the fine ad- 

 justment. The lever type as 

 designed by us for our curved 

 and handle arm stands has 

 proven to be the practical ad- 

 justment for fine focusing. 



The lever fine adjustment is 

 simple and durable, cannot be 

 damaged by forcing the microm- 

 eter head at either upper or 

 low^er limits of movement, ceases 

 to act when the objective comes 

 in contact with the slide and de- 

 velopes no lost motion after 



Microscope BH2 

 With lever fine adjustment $31.50 



Special terms to educational institutions yeaiS Ol USe. 



BAUSCH & LOMB OPTICAL CO. 



409 St. Paul St. ROCHESTER, N. Y. 



NEW YORK: 200 Fifth Ave. 

 WASHINGTON: 613 Fifteenth St., N. W. 

 CHICAGO: 122 S. Michigan Blvd. 



SAN FRANCISCO, 154 Sutter St. 

 FRANKFURT A.M.: G.m.b.H. 31 Schillerstrasse 

 LONDON: 37 and 38 Hatton Garden, E.G. 



