SCIENCE 



-/■'.Xx'u^oiiiaK 1^1 



New Series 



Vol. LIV, No. 140S 



Friday, November 18, 1921 



Bausch & Lomb 

 Automatic Clinical Microtome 



np HE Automatic Clinical Micro- 

 ■'- tome is a new model, with 

 feeding mechanism operated auto- 

 matically by the wheel-driven knife 

 carriage, and providing for cutting 

 5 microns and more in steps of 5 

 microns. 



The knife holder is mounted upon 

 a substantial support, constructed 

 to include ground metal bearing, 

 so fitted as exactly to guide the 

 knife edge always in the same 

 plane. An adjustable cam plate 

 guides the knife carriage in an 

 oblique direction, causing the knife 

 to move in a curve, bringing the 

 entire cutting edge into action with 

 a draw-stroke movement through 

 the specimen, which is particularly 

 desirable for the cutting of frozen 

 and celloidin sections. For paraf- 

 fin sectioning, provision is made for 



setting the knife at right angles to 

 the direction of movement. 

 Either the freezing attachment or 

 object clamp, which are inter- 

 changeable, can be used. 

 Write for illustrated, descriptive 

 circular on the new Clinical Micro- 

 tomes. 



Bausch ^ Ipmb Optical (5. 



409 St. Paul Street ROCHESTER, N. Y. 



Leading American Makers of Photographic Lenses, Microscopes, Projection Apparatus 

 (Balopticons), Ophthalmic Lenses and Instruments, Photomicrographic Apparatus, 

 Range Finders and Gun Sights for Army and Navy, Searchlight Reflectors, 

 Stereo-Prism Binoculars, Magnifiers and other high-grade Optical Products 



