In your own library, you have the illustrative 

 material for lectures of absorbing interest — 

 treasured prints, photographs, etc., all of 

 which can be faithfully reproduced by 

 means of a 



pauscH |omb 



Balopticoij 



For church, school and home en- 

 tertainments this simple and op- 

 tically perfect instrument is inval- 

 uable. 



Send for Circular 8 D 



Bausch & Ipmb Optical©. 



Our name, backed 

 by over half a cen- 

 tury of experience, 

 is on all our pro- 

 ducts — lenses, mic- 

 roscopes, field 

 glasses, projection 

 apparatus, engi- 

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 cientinc instru- 

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«CW TOftK WASHINGTON CHICAGO CAM rOAMCUCO 



i.oKDo« ROCHESTER.. NY. """raw. - 



Cocoa sold by 

 ■ flH 9 6azy dealers every- 

 where in 25c, 15c anf 

 10c cans. 







''*)>■ 



Refracting and Reflecting 



Astronomical Telescopes 



8 — i — =- 



Standard and Portable 



Visual and Photographic 



OBJECTIVES 



Computed by our associate 



DR. F. R. riOULTON 



{Chicago University) 



Illustration shows 5-in. with pneumatic clock. 



OBSERVATORIES 



Specula. Planes, Eyepieces, etc. 

 Photographs and Circulars on request 



LOHHANN BROS. 



SREENVILLE, OHIO :: :: U.S. 



