2 H GEOLOGICAL SURVEY OF CANADA. 



LAZULITE. 



Found three-quarters of a mile east of the mouth of the Churchill 

 Eiver, — District of Keewatin. Collected by Dr. K. Bell. 



Occurs massive in veins, having a maximum width of seven milli- 

 metres, traversing a greyish-white, in parts milk-white, subtranslucent 

 quartz. Colour fine deep azure-blue. Lustre vitreous. Fracture 

 uneven. Brittle. Streak white. Subtranslucent. Hardness very 

 nearly but not quite 5.5. Specific gravity — 3.0445. Before the 

 blow-pipe colours the flame pale bluish-green ; swells up, whitens and 

 falls to pieces, but does not fuse. 

 Analysis The material upon which the analysis was conducted, although 



selected with great care, and apparently pure, was nevertheless found 

 to contain 3.808 per cent, silica; in calculating the results this has 

 been excluded ; the composition of the mineral dried at 100° C„ then 

 being as follows : 



Phosphoric acid . . . c 46.388 



Alumina ...... , 29.140 



Ferrous oxide , 2.091 



Magnesia 13.838 



Lime 2.829 



Water 6.468 



100.754 



This is the first time that this interesting mineral has been met with 

 in Canada. 



GRAPHITE. 



In continuation of Report on Canadian Graphite (Report of Progress 

 1876-77, p. 489). 



1. — DISSEMINATED GRAPHITE. 



Graphitic shale. — From Glendale, Biver Inhabitants, Inverness 

 County Nova Scotia. Collected by Mr. Hugh Fletcher. 



Colour bluish-grey. Lustre of fracture across the plane of deposi- 

 tion, dull ; that of the fracture coincident with the lamination, sub- 

 metallic glistening. The graphite is very evenly disseminated through 

 the rock ; it occurs in the form of minute scales of a steel-grey colour 

 and metallic lustre. 

 Analysis of This shale was found to contain : 



disseminated 



KSSSHT Graphite 13 - 965 



Eock matter 85.799 



Hygroscopic water 0.236 



100. 



