. Canada's metals; a lecture delivered at the Toronto meeting of the British association for the advancement of science, August 20, 1897 . inthe same way can have a face of rigid steel tobreak up a projectile, and a tough back which willsave the plate from fracture. Now it is concededon all hands that the best way to enable themaker of the armour plate to triumph, is to instructhim to introduce into the steel some 4 to 5 per cent,of one of Canadas metals. This metal is nickel,and in the production of it she exceeds any othercountry in the world. The discovery of nickel in Canada and in Europep
. Canada's metals; a lecture delivered at the Toronto meeting of the British association for the advancement of science, August 20, 1897 . inthe same way can have a face of rigid steel tobreak up a projectile, and a tough back which willsave the plate from fracture. Now it is concededon all hands that the best way to enable themaker of the armour plate to triumph, is to instructhim to introduce into the steel some 4 to 5 per cent,of one of Canadas metals. This metal is nickel,and in the production of it she exceeds any othercountry in the world. The discovery of nickel in Canada and in Europepresents a curious historical parallel, for in Canadaand on the European continent nickel ores wereoriginally supposed to be valuable as a source ofcopper. Chronstet isolated nickel in 1751, andBergman confirmed his discovery in 1774. Canadasfamous deposits of nickel in the district of Algomain Ontario were worked as a source of copper solong ago as 1770, so that not twenty years afterChronstet had established the existence of metallicnickel, a great nickeliferous district had actually beendiscovered in Canada. The true nature of the. Fig. 10.—Heap oi nickeliferous regulus, Copper Cliff MinCj Sudbury, Canada. \_To face page 37. CANADAS METALS 37 deposit was, however, hardly recognised until theofficers of the Geological Survey pointed out ^ thatthe deposits of nickel would probably prove to beworkable. The recent history of these depositsshows that in no country of the world could sucha mass of nickeliferous regulus — a metallurgicalproduct—be matched as is shown in the photograph^(Fig. lo), which represents the stock of the CopperCliff Mine in July, 1890. It is impossible to deal in this lecture with theextraction of nickel from its ore, but a new processmay be mentioned on account of the great scientificinterest it possesses. It is based on the fact thatnickel and carbonic oxide will form a volatile com-pound, from which nickel is released at a tempera-ture of over 150°
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