Bausch & Lomb Balopticon Model C 



a high grade lantern for projection work. 



CJ This instrument is especially desirable for school use, 

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

 isfactory in performance. 



(f While designed for lantern slides, an attachment for the 

 projection in natural form and color of post cards, photo- 

 graphs, maps, drawings and other opaque objects can 

 be added when desired. 



€| Supplied for use with electric arc, oxy-hydrogen, 

 acetylene gas, alcohol vapor and Welsbach gas 

 lamps. 



•I Descriptive circular 8 D 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 & lomb Optical (jo. 



|ltW YORK WASHINGTON CH1CACO SAN FRANCISCO 



LONDON ROCH ESTER.. NY. FRANKFORT 



In the manufacture of 



COCOA 



Cocoa Beans of the highest grades only, 

 scientfically blended, are used. 



Cleanliness and Workmanship in our Plant 



are as carefully scrutinized as is the 



quality of material used. 



Under such conditions it is not surprising 



^t«S^X^» 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. 







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3% . .. , 



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Refracting and Reflecting 



Astronomical Telescopes 



— 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. ilOULTON 



(Chicago University) 



OBSERVATORIES 



Specula, Planes, Eyepieces, etc. 



- 



Illustration shows 6-in. with pneumatic clock. 



Photographs and Circulars on request 



LOHHANN BROS. | 



U. S. Ac 



mEENVILLE, OHIO 



