The Rendering of B 



eeszi'ax. 



163 



of the acid almost indispensable. ,\ kettle or some other vessel is filled 

 perhaps one-third full of water, and then filled up with cakes of wax. 

 By the use of steam, or by setting the vessel on a stove, the wax is 

 melted, when acid is added at the rate of about one pint of acid to twelve 

 gallons of water. Soon after the acid is poured in, the wax will be seen 

 to change to a lighter hue, when the heat may be stopped and the sedi- 

 ment allowed to settle, after which the pure wax can be dipped off the 

 top. If a metal vessel is used, it must be thoroughly washed after use ; 

 and it would be well to rub it over with grease to prevent any further 

 action of the acid. 



