. The Canadian record of science. Natural history; Science. 182 Canadian Record of Science. produced by reduction of salt-cake with coal. The sodium sulphide forms with the matte an exceedingly fluid magma, from which, on cooling nickel separates as a " bottom" or cake of nickel sulphide occupying the lower part of the matte pot, while copper floats upward with the soda sulphide. After cooling a sharp demarcation line is Fig. 4. found between the two sulphides, and separating the " bot- toms' or crude sul- phide of nickel and repeatedly resmelt- ing with sodium sul- phide the co
. The Canadian record of science. Natural history; Science. 182 Canadian Record of Science. produced by reduction of salt-cake with coal. The sodium sulphide forms with the matte an exceedingly fluid magma, from which, on cooling nickel separates as a " bottom" or cake of nickel sulphide occupying the lower part of the matte pot, while copper floats upward with the soda sulphide. After cooling a sharp demarcation line is Fig. 4. found between the two sulphides, and separating the " bot- toms' or crude sul- phide of nickel and repeatedly resmelt- ing with sodium sul- phide the copper can be almost entirely removed and pure sulphide of nickel can be produced. We are thus justified in drawing the fol- lowing inference. If copper-nickel- iron sulphides can be held in a molten condition either by using prolonged heat or by imparting fluidity by the addi- tion of Huxes for a sufficient period of time to allow the mutual repulsion of the metals to act, the copper and nickel will separate as individual minerals, the sharpness of separation being' dependent on the fluidity of the mass and the time occupied in ^0^ m m n% 21% Central vertical line of matte. Vertical column = per cent. Horizontal column dis- tance from top of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal : Natural History Society
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