398 Elements of 



TABLE I. 



The Quantity of Metal in a Regullne State af- 

 forded by 100 Grains of different Metallic 

 Calces^ and to which confequently they are 

 rejpeffiively equivalent. 



100 Grains ----- Grains. 

 Brown calx of iron afford of 



regulus - - - from 79 to 89 grs, 

 Red ditto - - - from 71,4 to 78 

 Brown calx of copper from 84 to 86,5 

 Minium ----- 89 

 Calx of tin - - - - 96 

 Precipitate per fe - - 92 

 Flowers of zinc - - 85,5 

 Calx of bifmuth 98 



Grey calx of antimony 96 



White calx of manganefe 54 



Hence the quantity of calx, which loo 

 parts of any of thefe metals would afford, is 

 eafily found; thus loogr. of lead would af- 

 ford 113 of minium for -^89. 100 : : 100 



TABLE 



