THE COMPOUND MICROSCOPE. 



105 



THE MICROSCOPE OF CHEVALIER. 



This instrument, called the universal microscope, is repre- 

 sented by fig. 52. The foot, or base, is formed by the box 



Fig. 52. 



in which the microscope is packed; into this is screwed a 

 stout pillar, A A, supporting a square piece of brass, B, 

 having a cradle joint, C C, at each extremity. With the 

 upper surface of this piece of brass, B B, is connected the 

 compound body, D, having at one end a piece of tube, M, 

 containing a smaU prism, m o, and at right angles to it a 

 smaller tube, carrying the object-glasses, n. To the lower 



