BAUSCH & LOMB 

 UNIVERSAL BALOPTICON 



THIS apparatus is designed to meet the very broadest re- 

 quirements of projection work, with special reference 

 to the work of the Physicist and Biologist. 

 (fit is regularly equipped for opaque, vertical and 

 lantern slide projection. 



<| It embodies the latest and most advanced mechanical 

 features which have gained for our projection apparatus their 

 wide preference in every field. 



t| Efficient, simple and easily operated. 



Cfl Prices from $145.00 up, depending upon equipment. 



CJ] Descriptive literature on request. 



Our Name on a Photographic Lens, Micro-- 

 scope, Field Glass, Laboratory Apparatus, 

 Engineering or any other Scientific In- 

 strument is our Guarantee. 



Bausch & Ipmb Optical (o. 



tUVt YORK WASHINGTON CHICAGO SAN FRANCISCO 



LONDON ROCHESTER,. NY. FRANKFORT 



Cocoa sold 

 by dealers 



everywhere in 25c, 15c 



and 10c cans. 



Illustration shows 5-in. with pneumatic clock. 



Refracting and Reflecting 



Astronomical Telescopes 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. HOULTON 



( Chicago University) 



OBSERVATORIES 



Specula, Planes, Eyepieces, etc. 



Photographs and Circulars on request 



LOHflANN BROS. 



GREENVILLE, OHIO 



U. S. A. 



