Supporting the Fine. 173 



mend that recently invented by M. Thiry, and which 

 is represented in Figure 72. It answers all the purposes 

 required of it, and its price is extremely moderate 



[FiG. 74.] Stretcher in Operation. 

 two cents. This stretcher is used in the following 

 manner : The wire being fixed at both extremities, and 

 the stretcher made to slide about half way, the two 

 square ends of the axle of 

 the stretcher are introduced 

 into the holes of the pin- 

 cers, shown in Figure 73. 

 This pincer, made of strong 

 sheet-iron, and having hing- 

 es, costs only six cents. 

 Figure 74 shows the position 

 of the pincers when fixed. [FiG. 75.] Key. 



It is held firmly in this position with the left hand. - 

 With the right hand the key [Fig. 75] is placed on the 

 square end, A, of the axle of the stretcher, and a circu- 

 lar motion is given to the latter, until the wire is suffi- 

 ciently stretched. The stop is made by means of one 

 of the two hooked ends terminating the sides of the 

 stretcher, C. 



