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REFRIGERATORS. 75 



IMPROVED BRUSHES. 



Sereral kinds of brushes, and- particularly clothes, hair, and 

 tooth brushes, are made advantageously of gum-elastic ivory 

 and whalebone, in the following manner. The block or part in 

 which the bristles are inserted may be made of wood or of gum- 

 elastic whalebone. In this case, the holes in which the bristles 

 are inserted are made with pins by one impression or stamping 

 in the plastic material. The part in which the bristles are in- 

 serted is afterwards glued or fastened by screws into the handle 

 of India rubber ivory, which is made with a rim around the edge 

 to receive it. See plate , fig. 



ELASTIC BRUSHES. 



These brushes, which are of curious construction, are formed 

 of octagonal or round tubes of elastic compound, set endwise 

 upon a handle of caoutchouc ivory. These tubes are cemented 

 together at the sides, and when cemented upon the handle, the 

 brush has the appearance of a honey-comb on the face. They 

 are better than the sponge brush, described in the beginning of 

 the chapter, for removing dust from garments, but not so good 

 for removing grease spots, &,c. See plate , fig. 



PASTE BAG. 



The inconvenience of keeping flour paste for any length of 

 time in such a state that it will not soon dry up, is experienced 

 by many. This difficulty may be avoided by the use of a bag 

 made of India rubber fabrics, as represented plate , fig. 

 That represented by fig. , made in the shape of a plain bottle, 

 fig. , is constructed like self-inflating air-work. In both of 

 them the tubular stopper is used. This bag will be found both 

 economical and convenient. 



