Abstract
ALTHOUGH the crystallisation of alloys and of f-I. minerals must in its nature be essentially similar to that of the more ordinary solutions handled in the laboratory, the ranges of temperature and pressure involved are so far different as to make any experimental study a matter of considerable difficulty. In the case of the metallic alloys, the difficulties incident on the production and measurement of high temperatures have in recent years been overcome by the use of platinum-resistance thermometers, as in the investigation of the copper-tin alloys by Heycock and Neville, or by the use of thermal- junctions of platimim with a platinum alloy, as used so effectively by Roberts-Austen and his colleagues in the work of the Alloys Research Committee. As a result of these investigations, the conditions under which the different constituents separate from a liquid alloy, and the changes which occur as the solid ingot cools, are as fully known as the conditions which determine the separation of ice or salt from an aqueous salt solution.
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LOWRY, T. Recent Experiments on the Crystallisation of Minerals . Nature 75, 112–113 (1906). https://doi.org/10.1038/075112a0
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DOI: https://doi.org/10.1038/075112a0