
Price, $35.00 
Bausch & Lomb Balopticon 
Model C 
There is a human appeal in pictures which is stimulating to 
the mind. 
The Pedagogical command “ Arouse interest!” js NEVER YN Fy NEVER EE 
METROPOLITAN des 
obeyed literally when the projecting lantern becomes a part of 
the school equipment and is used as an aid in teaching. 
Our Model C is simple, scientifically constructed, 
durable and easily operated. 
It is designed for lantern slide projection and attach- 
ments for opaque and microscope projection can be had. 
Descriptive Circular 8 D on request. 
Tin 
Our Name on a Photographic Lens, Micro- id ea Ges peti , 
x) scope, Field Glass, Laboratory Apparatus, AVOR 
3} Engineering or any other Scientific In- COnBOISSEeES NESS ano FL 
=8 strument is our Guarantee. Fs. : a aad 2 
Bausch £7 lomb Optical ©. | Sige taraeres cee ee 
ew YORK WASHIRCTON CHICAGO SAN FRANCISCO TEN CENTS & FIVE CENTS 
LOVDON ROCHESTER. N.Y.¢FRANKFORT SOLD: EVERYWHERE 



Refracting and Reflecting 
Astronomical Telescopes 
——— 
Standard and Portable 

Visual and Photographic 
OBJECTIVES 
Computed by our associate 
DR. F. R. MOULTON 
(Chicago University) 
OBSERVATORIES a 
Specula, Planes, Eyepieces, etc. 
Photographs ava Ciel on request 
LOHIIANN BROS. 
Mlustration shows 5-in. with pneumatic clock. GREENVILLE, OHIO ':: s3 0 U. S. Ao 
A CHOCOLATE or RARE QUALITY 

