Tue Microscope. 108 
claim that the cam gives the minimum of trouble for wear and 
loss of motion thereupon. 
TRAN ALI PW OTO-LLLE Ca, We Pa 
Distal Cam fine adjustment adapted to the Students’ Microscope of the Boston Op- 
tical Works, by the writer. 
In this cut the stage is represented as arranged for use, so 
that it can be elevated or depressed. When notin use the cam 
lever is turned so as to lie parallel with the stage, and the stage 
is not put on a stretch. 
The object is placed on the stage, the coarse adjustment 
made and followed by the fine adjustment. 
