Rev. Mr. Greg q-r on f be Tremolite of Cornwall. 403 



nesia. The lime was converted, by means of sulphuric acid, into 

 gypsum, and thus severed from its associate. 



The relative proportions of the ingredients are as follows. 



Silica - - . 62.2 



Lime - - 14.1 



Magnesia - 12.9 



Oxide of Iron. - 5.9 



Water - - I. 

 Of Man^ 

 a trace 



loss- - - - "3.9 



iganese and Soda, ? ___^ 

 :e - - - - C ' 



ioo,a 



