
Bausch & Lomb Balopticon Model 
C for Opaque Projection 
makes available for work in the class room the 
widest range of illustrative materials such as post 
cards, photographs, prints, etc. 
It projects pictures 4x44" in natural form and 
color. 
The apparatus is very simple, is very easily op- 
erated and is very durable. 
We also manufacture a Combined Lantern Slide 
and Opaque Projector. 
Our Name ona Photogrc, ..: Lens, Micros 
Descriptive literature on request. 
scope, Field Glass, Laboratory Apparatus, 
Engineering or any other Scientific In- 
7, strument is our Guarantee. 
Bausch £9 lomb Optical ©. 
MEW YORK WASHINGTON CHICAGO SAN FRANCISCO 
LONDON ROCHESTER, N-Y, RANKFORT 




ick 

Illustration shows 5-in. with pneumatic clock. 

Astronomical Telescopes 
GREENVILLE, OHIO — :: 3 





ie 
AN EQUAL FRE 

HIGHEST tn 
BE CoL /QUALITY,SMOOTR 
ror CHOCOLATE 
CONNOISSEURS 
TEN CENTS E CENTS | 
SOLO EVERYWHERE 
Refracting and Reflecting 
Standard and Portable — 4 
Visual and Photographic 
OBJECTIVES 
Computed by our associate 
DR. F. R. MOULTON 
(Chicago University) | 
OBSERVATORIES _ 
Specula, Planes, Eyepieces, etc. 4a 
Photographs and Circulars on request — 
LOHIMANN BROS. 
U. S 
e@ 6! 
— 
