278 



Canadian Record of Science. 



Percent. 



Orthoclase 



Albite 



Anorthite 



45.04\ 

 25.68 V F 

 6.12 I 



Nephelite + 2II 2 9.60 I L 

 Diopside 



Sal. 



Magnetite 



Ilmenite 



Hematite 



Apatite 

 H,0 



3.491 Y\ 



.76 Lm 



1.44 f 



.31 J A 

 3.11 



Fern. 



10U.19 



pL =86 .44 



Class, rem 



10.64 



= 1, persalane. 



Order, L 9.60 

 F 76.84 



-= perfelic = 5 = canadare. 



Rang, Na.,0 + K 2 0' 160 7 



— „ n . == ^r— Z> T~ = peralkalic = 1, Nordmarkase. 



CaO' 22 1 r 



Subrang, K 2 



Na.,0 / 



81 5 3 



-~- <C^ > — =Sodipotassic'= 3 Phlegrose. 



In closing it may be remarked that blairmorite occupies 

 a somewhat similar position to that which theralite (nephelite 

 gabbro) once held. Prof. Rosenbusch gave the name thera- 

 lite to a rock of this composition and texture previous to its 

 discovery in the Crazy Mountains, Montana, by Wolff. 1 



1. Notes on the Petrography of the Crazy Mts. etc., Northern Transcontinental 

 Survey 1885 



