28 



CONSTRUCTION OF THE WIRE FRAMES. 



an open tumbler. The soldering water is somewhat poisonous, and 

 if dropped upon articles of clothing produces spots, frequently of a 

 red colour; they may be removed by touching the spots with a 

 solution of ammonia carbonate (spirit of hartshorn). The wire 

 for the frames should be about l'5 mm thick. The required lengths 

 are best cut off with a pair .of strong and sharp nippers, fig. 33 B, 



FIG. ,33 (^ real size}. 



which should only be used for wire-cutting ; for ordinary purposes, 

 such as drawing nails, breaking objects, a common pair of pincers, 

 fig. 33 A, should be used. 



To form the rings, fig. 26, nip off a piece of wire about 30 or 

 32 cm long. With the round pljers make first at one end the little 

 hook, and bend the wire at right angles at a-. The ring itself is 

 then shaped by the fingers with, the help of the flat pliers, until the 

 other end is opposite to a. Moisten the end, and the part at a 

 opposite to it with the soldering water, either with a hair pencil 

 or a feather from which the plume has been cut away all but a 

 small portion at the end. Hold the moistened part a in the flame 



Fro. 34 (| real sise\. 



of the spirit lamp, or Bunseri's burner, and place a piece of solder 

 not larger than a lentil upon it. This may be done with a pair 

 of tweezers or forceps (fig. 34), or a piece of wire may be moistened 

 at one end with soldering water, heated, and rapidly brought into 

 contact with a small piece of solder, which will then firmly adhere 

 to the wire. When the solder adheres at the bend a, the other end 



