Bausch & Lomb 

 Convertible Balopticon 



possesses the following characteristic advantages: 



CJ It allows great latitude in the size and shape of the 

 natural or opaque objects to be projected. 



•J The projection of objects in either a vertical or a 

 horizontal plane by means of a rotating dark chamber. 



CJ Exceedingly brilliant image of objects either opaque 

 or transparent due to highly corrected optical parts. 



<J Instant interchange from opaque to transparent 

 projection, or the reverse. 



C[ Ingenious design, superior workmanship and mechanical 

 construction. 



CJ Descriptive literature and prices 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 Q. 



|IBW VOBK WASHTKCTON CHICAGO SAN FRANCISCO 



LONDON ROCHESTER., NY. FRANKFORT 



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CHOCOLi 



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 THE 



LIGHT OF 

 TlGflTlON 



i QUALITY 

 flTYflWa FLAVOR 



«^db? Candies of Rare Quality 



Sold by Sales Agents everywhere and at 

 *%ff£& 55 Retail. Shops, in Principal Cities 



Refracting and Reflecting 



Astronomical Telescopes 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. riOULTON 



{Chicago University) 



OBSERVATOR IBS 



Specula, Planes, Eyepieces, etc. 



Illustration shows 6-in. with pneumatic clock. 



Photographs and Circulars on request 

 LOHHANN BROS. 



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



