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BIRD GLASSES^ 



Like almost anything else are of various grades of excellence and 

 also like other things it does not pay to buy the cheap kind. 



jl Better spend a little more at first and get the 



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STEREO BINOCULAR. 



The new prism glasses giving the largest field, clearest brightest 

 and only true stereoscopic image. This glass is used by the 

 Armies and Navies of the great nations and by expert ornitholo- 

 gists everywhere. 



Bausch & Lomb Optical Co. 



ROCHESTER., N. Y. 



Ill NEW YORK. 



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CHICAGO. 



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