Bausch & Lomb Balopticon Model C 



a high grade lantern (or projection work 



•I This instrument it especially desirable (or school use, 

 being simple in construction, easy to rperate and entirely sat- 

 isfactory in performance. 



<J While designed (or lantern slide an attachment (or the 

 projection in natural (orm and color of post cards, photo- 

 graphs, maps, drawings and other opaque objects can 

 be added when desired. 



•J Supplied (or use with electric arc, oxy-hydrogen, 

 acetylene gas, alcohol vapor and Welsbach gas 

 lamps. 



CJ Descriptive circular 8 D on request 



Our Name on a Photographic Lens, Mien- 

 scope. Field Glass, Laboratory Apparatus, 

 Engineering or any other Scientific In* 

 strumenl is our Guarantee. 



Bausch & Ipmb Optical (5. 



ty* VOftK WASHINGTON CH1CACO 6AN TRANCISCO 



I.ONDON ROCHESTER., NY. "*ANKrORT 



In the manufacture of 



COCOA 



Cocoa Beans of the highest grades only, 

 scientfically blended, are used. 



I Cleanliness and Workmanship in our Plant 

 are as carefully scrutinized as is the 

 quality of material used. 



Under such conditions it is not surprising 



that 



COCOA 



is the acknowledged Best in the World. 



| The standard by which others are judged.] 



Quality higher than price. 



Price within the reach of all. 





Refracting and Reflecting 



Astronomical Telescopes 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. flOULTON 



(Chicago University) 



Illustration $hows 5 -in, with pneumatic dock. 



OBSERVATOR IES 



Specula, Planes, Eyepieces, etc 

 Photographs and Circulars on request 



LOHHANN BROS. 



GREENVILLE, OHIO :: :: U.S.A. 



