The Microscope. 



37 



In the sketch the stage and carrier are supposed to be viewed 

 from below looking upward. 



The device consists of a glass plate held in a brass ring A B 

 C D F, which slips over the regular brass stage, bringing the 

 glass plate down nearly into contact with it. A certain amount 

 of clearance between the two for the working of the metal clips 

 W and P X is secured by the brass stage bringing up on the 

 ledge Y Z of the metal ring, thus keeping the glass about one- 

 sixteenth of an inch from the brass stage. The brass ring is 

 cut away down nearly to a level with the glass at two places, A 

 F and C I). On top of the glass plate (underneath in the 

 drawing) is a metal plate about one-twentieth of an inch thick, 

 shown in dotted lines K M N L, with a hole, S T, one and one- 

 half inches in diameter. At the two ends this plate projects to 

 W and X, where two finger-buttons are attached. Here also are 

 attached two bent clips, W and P X, which come down under 

 the glass plates (on top in the drawing) and rest on it at and 

 P. At E a small steel pin, about one thirty-second inch in 

 diameter, is set into the brass ring. In P X is a slot in which 

 this pin neatly works. The pieces W and P X are so bent and 

 curved that they hold, with the action of a spring, the metal 

 plate into contact with the glass. The plate has cemented to it 

 at K L M N bits of chamois skin and small pieces of the same 

 are placed under the points P and 0. The actual contact is 

 thus between the glass stage and these pieces of chamois, 



