/ 



Notice to JRaatfer.— When you finish readins 

 this magaxinef place a 1 cent stamp on this noticst 

 mail the magaziae, and it will be placed in th« 

 hands of our soldiers or sailors 



Ko wrapping— Ko Address. 



SCIENCE 



New Sekibs 



Vou XUX, No. 1273 



Friday, May 23, 1919 



SiNOLE Copies, 16 Crs. 

 Ahhc^l Subscbiptiom, tS.OO 



Qauscli'|oml> 



p^icroscopes 



are again in the market — backed 

 by the prestige which 

 to successful war servi 

 significant capacity 



FS2 MICROSCOPE 

 Price $40.75 



Our release from this service is of course gradual. 

 As the demands made upon us by the government are 

 lessened from month to month, however, we are enabled 

 to increase deliveries proportionately to our other 

 patrons. 



Write for complete catalog of our revised microscope 

 line and inform us regarding your requirements. 



Bausch ^ Ipmb Optical (o. 



409 ST. PAUL STREET ROCHESTER, N.M 



New York 



San Tranclsco 



Washinfton Chicago 



Leading Ameiican Makers of Photographic Lenses, Microscopes, Projection 

 Apparatus (Balopticons), Ophthalmic Lenses and Instruments, Pholomicro- 

 graphic Apparatus, Range Finders and Gun Sights for Army and Natn/, 

 Searchlight Reflectors, Stereo-Prism Binoculars, Magnifiers and other High- 

 Grade optical Products. 



