SCIENCE 



New Skkies 



Vol. XXXVII. No. 965 



Friday, June 27, 1913 



Single Copikb, 15 Cts. 

 Annual Subscription, $5.00 



NEW CONVERTIBLE 

 Bausch&Lomb Balopticon 



In its Simplest Form Provides for 

 Lantern Slide and Opaque Projection 



Can be easily built up, as illustrated 

 for all other forms — microscopic, 

 vertical and polariscopic — with 

 quick and convenient interchange 

 from one to another. 



Opaque objects of widely varying 



size and shape can be placed in hori- 

 zontal position and surfaces S-inch 

 square projected brilliantly — Lamp 

 house tilts (see dotted lines in illus- 

 tration) to throw light directly on 

 object, giving maximum illumination 

 for single lamp. 



Write for literature or farther information 



Bausch fj'Ipmb Optical (5. 



552 ST. PAUL STREET ROCHESTER, N.M 



New York 



Washington 



San Francisco 



