1G H GEOLOGICAL SURVEY OF CANADA. 



Iron ores— This specimen was examined for titanic acid, and found not to 



analyses of, , . 



cont. contain any. 



6. — From the sixteenth lot of the seventh range of the township of 

 Lutterworth, County of Halliburton, Ontario. 

 A somewhat fine crystalline-granular magnetite. 



The gangue in this srjecimen consisted mainly of calcite and a 

 yellowish-brown mica. It was found to contain : 



Metallic iron 46-50 per cent. 



Insoluble matter 20-16 " 



No titanic could be detected in this specimen. 



COPPER ORES. 

 Copper ores— 1- — From Spar Island, Lake Superior. 



analyses of, 



This specimen will be found fully described under Gold and Silver 

 Assays, No. 9. It contained : 



Copper 38-24 per cent. 



2. — From lot A, north sido of Echo Lake, District of Algoma. 



The specimen was received from G. F. Austin, Esq., and was 

 taken from a vein twenty-six feet wide. It consisted of copper- 

 pyrites in a gangue of white sub translucent quartz, and was for 

 the greater part coated with a thin film of hydrated peroxide of 

 iron, which latter mineral also filled the small cavities and numer- 

 ous delicate fissures occurring in the specimen. In this instance 

 the associated quartz amounted to forty-four per cent, of the 

 sample. It was found to contain : 



Copper 18-74 per cent. 



3. — From Poole's Shaft, Skincuttle Inlet, Queen Charlotte Islands, 

 British Columbia. 



Collected by Dr. G. M. Dawson. A very fine granular, almost 

 compact, bluish-black magnetite, carrying a little copper-pyrites ; 

 with here and there a slight incrustation of green carbonate of 

 copper and an occasional stain of hydrated peroxide of iron. The 

 sample examined was found to contain 21-82 per cent, of insoluble 

 siliceous matter, and : 



Copper 1-89 per cent 



This ore was assayed for gold and silver by Mr. Frank D. 

 Adams, but without detecting a trace of either. 



