512 Evans and Bancroft — Gedrite in Canada. 



This gives a formula corresponding to that suggested by Ram- 

 melsberg, namely, 4RSi0 3 +A] 2 3 where R = Mg,Fe,H 2 . 



From this analysis, as well as from its negative character, 

 it will be seen that the mineral belongs to the aluminous 

 variety of anthophyllite known as Gedrite, this being, as above 

 mentioned, as far as can be ascertained, the first occurrence of 

 this variety reported from North America. The close similar- 

 ity in composition of the mineral from Harcourt and the 

 original gedrite from the valley of Heas near Gedres (Hautes- 

 Pyrenees) will be noted. 



Geological Laboratory, 

 McGill University, Montreal. 



