SCIENCE 



^^l^'^'^n in,« Friday, August 28, 1914 singlk copi™, le om 



VOL. XL. No. 1026 ' ' ANHCA.L SUBBOBIPXIOH, 96.0 



Bausch & Lomb Optical Co. 

 Carl Zeiss Works, Jena 



The close identity of the two leading optical houses of America and 

 Europe is unique in its conception and operation. It has for its aim 

 joint scientific achievement — the interchange of ideas, suggested im- 

 provements and individual productive efforts in which each firm enjoys 

 the benefit of the other's progress. 



This close relation applies in the fullest sense to the Microscope, Pro- 

 jection, Telescope, Range Finder, Photographic Lens and Field Glass 

 department— in fact, to every line of our activity. The results thus far 

 show gratif3ring advances, in both optical and mechanical attainment, 

 and the future promises a still higher accomplishment. 



If further interested, write for our booklet describing this alliance and 

 the separate enterprises. 



Bausch ^Ipmb Optical (5. 



409 ST. PAUL STREET ROCHESTER, N.\; ^^r?,/ f.ji 



NEW YORK WASHINGTON CHICAGO SAN FRANCISCO 



