2 Stko.MKVKR, TJic Foniiation of Minerals in Granite. 



freezing takes place below o^'C, the ice formed u ould not 

 melt again until o'^C is reached. The process is therefore 

 not a reversible one. Another point tirged is the difficulty 



Taule I. 

 MELTING TEMPERATURE OE MINERALS.^ 



of accounting for water in the quartz of granites, and, more 

 particularly, why it should be found in the quartz and not 

 in the other minerals, or only slightly so. This is, to my 



* Extracts from J. Joly, " Melting Points of Minerals,"' Proc. K.I. A., 

 Scr. 3, Vol. 2 (1891), p. 39; and R. Cusack, ilnd, Ser. 3, Vol. 4. (1897), 

 p. 411. 



