1892.] 



THE MICKOSCOPE. 



183 



Fine Adjustment of the Beck Pathological Microscope. 



— The fine adjustment of Beck's new pathological microscope 

 is, we believe, one of the most sensitive and delicate fine adjust- 

 ments yet produced. It is constructed, as shown in the accompany- 

 ing figure, in this manner : The body of the instrument is sup- 

 ported upon the barrel DD ; this barrel is accurately and smoothly 

 fitted to the triangular core EE. At the top of the barrel DD is 

 screwed the cap G to w^hich is attached the rod C. This rod 



( o 



\ V 



/ 



passes through the centre of the core EE and connects with the 

 lever arm A at B. The action of the spring L, which is wrapped 

 spirally around the rod C, raises the body of the microscope and 



