Fountain Pen?Y 
5” 
That's the constant thought of every | 
user. Twenty years of test and triumph. f 
BAUSCH @ LOMB 
PROJECTION 
APPARATUS 
he most complete lecture 
duced nter lides and 
microscopic objects shown 
comsecutivel out 
change of light or recenter- 
ing. 
CATALOG C ON REQUEST 
Bausch @ Lomb Optical Co. 
Manufacturers Microscopes, Photographic Lenses 
and Shutters, Eyeglass Lenses, Field Glasses, etc. 
Rochester, N.Y. 
New York Chicago 
Boston San Francisco 
Frankfurt A/m Germany 
Agents desired 
to deal directly 
with the Factory 
