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No. 5.] HARRINGTON — CANADIAN MINERALS. 309 



That pyrrhotite is a common mineral in our Laurentian rocks 

 is well known, and it is not unlikely that, as in Norway so here, 

 deposits of both pyrrhotite and pyrite may yet be found, contain- 

 ing sufficient nickel for profitable extraction. A short time ago 

 it was estimated that Norway annually supplied as much nickel 

 as one- third of the yield of the whole world.* 



III. Iron Ore from South Ham, P. Q. 



Near the west shore of Lake Nicolet, in the first range of 

 South Ham, there occurs a deposit of iron ore which is stated to 

 be of considerable extent, and to occur in serpentine. A speci- 

 men recently examined was black in colour, and gave a black 

 streak. It was readily attracted by the magnet, and had a 

 specific gravity of 4.5. The following partial analysis shows the 

 ore to be of interesting and unusual composition : 



Metallic iron 44.69 p. c. 



Chromium sesquioxide 8.31 " 



Titanium dioxide 21.64 '' 



Such an ore would be of little value in the market at present, 

 although it might be utilised by mixing with other ores. Ac- 

 cording to some authorities both chromium and titanium exert a 

 beneficial influence upon the character of steel ; but in a number 

 of cases steels, reported to contain one or other of these constitu- 

 ents have been shown to be entirely free from them. 



* Amer. Jour, of Mining, Oct. 18th, 1879. 



