Abstract
ALTHOUGH the undercooling of pure metals was observed by Roberts-Austen so long ago as 1898, no experiment have so far been published regarding the super of although explanations of certain structte have been based on their existence particularly regard to eutectics. The recent May Lecture of Sir Henry to the Institute of Metals o.n The Growth of Crystals in Supersaturated Liquids is now followed by a paper by Dr. Marie L. V. Gayler, delivered before the Institute of Metals on Sept. 7, on the effects of undercooling in some alloys of aluminium, in par-ticular with silicon. The work was carried out for the Engineering Research Board at the National Physical Laboratory under the supervision of Dr. W. Rosenhain and breaks entirely new ground. For the first time the supersolubility curves for an alloy system are available, and with their aid an explanation of the structures of the aluminium-silicon alloys can be offered with a considerable degree of certainty.
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