294 CHLORIDES. 



tin and gold, and obtained by adding protochloride of 

 tin to a gold solution. 



737. GLASS STAINING. The effect of 

 effects be illua- oxides, above mentioned, in coloring glass, 

 trated? mav ^ Q jn us t ra ted by fusing them into a 



borax bead. The bead is to be formed with the 



aid of the blow-pipe, in a loop of platinum wire. 

 In the absence of such wire, the borax glass 

 may be made upon the surface of a pipe bowl. In- 

 stead of employing the oxide, it is generally more 

 convenient to moisten the bead with a very small 

 quantity of a solution of the metal. In order to obtain 

 good colors, the quantity of coloring material employed 

 must be very small. 



738. For staining glass and porcelain su- 

 and porcelain perficialiy, a colored and easily fusible 



S laSS 1S fil>St P re P ared with borax Or S0me 



analogous material. This being ground 

 up and applied as a paint, is afterward baked into 

 the surface. Several of the oxides mentioned in a pre- 

 ceding paragraph are thus employed. 



CHLORIDES. 

 739. DESCRIPTION. The chlorides are, 



Describe some 



of the proper- for the most part, soluble salts, of colors 



corresponding to the solutions of the metals 

 from which they are produced. Common 

 salt may stand as a type of the class. The 

 chloride of silver, subchloride of mercury or 

 calomel, are insoluble, and the chloride of lead 

 but slightly soluble in water. 



