PHYSIOLOGICAL REMAINS. 195 



if they will incorporate, make a plate of them, and 

 burnish it as they do iron. 



Take a pound and a half of brass, and half a 

 pound of iron ; two ounces of the calaminar stone, 

 an ounce and a half of brimstone, an ounce of lead ; 

 calcine them, and see what body they make ; and if 

 they incorporate, make a plate of it burnished. 



Take of copper an ounce and a half, of tin an 

 ounce, and melt them together, and make a plate of 

 them burnished. 



Take of copper an ounce and a half, of tin an 

 ounce, of glass-metal half an ounce ; stir them well 

 in the boiling^ and if they incorporate, make a plate 

 of them burnished. 



Take of copper a pound and a half, tin four 

 ounces, brass two ounces ; make a plate of them 

 burnished. 



Take of silver two ounces, tin half an ounce ; 

 make a little say-cup of it, and burnish it. 



To inquire of the materials of every of the kind 

 of glasses, coarser and finer, and of the proportions. 



Take an equal quantity of glass-metal, of stone 

 calcined, and bring a pattern. 



Take an ounce of vitrified metal, and a pound of 

 ordinary glass-metal, and see whether they will in 

 corporate, and bring a pattern. 



Bring examples of all coloured glasses, and learn 

 the ingredients whereby they are coloured. 



Inquire of the substance of galletyle. 



