Ji 



Fig. 223b. The Spencer Lens Company's New Automatic 

 Laboratory Microtome, with parallelogram principle, giving a 

 curvilinear knife movement similar to that of free hand section- 

 ing; with automatic feed and with independent crank for quickly 

 raising or lowering the object. The convenient drip pan may be 

 quickly unscrewed. Furnished when desired with Gaylord's 

 freezing attachment for CO2 . 



The joints are provided with hardened steel pivot screws and 

 with check nuts. Lubrication not required. 



