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S C I E N \]r& 1 



Niw Series 



Vol. LVI, No. 14.59 



Friday, December 15, 1922 



AnNTTAL SUBSCEIPTION, $6.00 



Single Copi^, 15 Ots. 



Bausch & Lomb 



Photom icrographic 



Camera, Type F 



A new photomiorographie camera, for use either horizontally 

 or vertically, with supports thoroughly braced to make it extremely 

 rigid in both positions. The very moderate price at which it is 

 offered places it well within the reach of any school or college 

 laboratory. 



Designed for use with any standard make of compound micro- 

 scope, and can be used in making unusually large photographs, as 

 — .. it accommodates 8 x 10-in. plates. 



Rear camera frame is fitted with reversible 

 back with spring door; front frame equipped 

 with automatic shutter. Supplied with either 

 Mazda or Tungsarc lamps. 



Price, with Mazda lamp and transformer, for 

 110-volt current, without microscope, $235.00 



Our new, conipleie catalogue of PhotomicrograpUc Equipment has just come from the 

 press. If you are interested in this apparatus, we will be glad to send you a copy. 



Bausch & Lomb Optical Company 



409 St. Paul Street, Rochester, N. Y. 



New York Washington Chicago San Francisco London 



Leading American Makers of Optical Measuring Instruments, Photomic 



Lenses, Microscopes, Projection Apparatus (Balopticons), Ophthalm.. ^„.^o <„.„ i..»„un 

 Kange hmders and Gun-Sights for Army and Navy, Searchlight Reflectors, Stereo-Prism 

 Binoculars, Telescopes, Magnifiers, Automobile Lenses and other High-Grade 

 Optical Products. 



■aphic Apparatus, Photographic 

 Lenses and Instruments, 



that eyes rmy see ■^" -- ^^s^pp-^"--*^''"'--^ -^^ 

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