Abstract
SCIENTIFIC readers of the new volume of this Journal will probably turn first to the May Lecture, in which Prof. H. A. Lorentz deals in a most fascinating manner with the most recent knowledge of the motion of electricity in metals, including the determinations of the velocity of moving electrons in a conductor, and with the phenomena of super-conductivity. The whole lecture is a model of reasoning and exposition. The papers contributed to the Institute cover a wide range, the properties of the various alloys of copper occupying as usual a considerable proportion of.the space. Problems of corrosion are dealt with in several papers, and it is satisfactory to notice that the apparently irreconcilable positions taken up by different investigators have now been examined in an impartial spirit, and an agreed statement has been issued, so that further experimental work can proceed without the atmosphere of controversy which has so long enveloped the subject. An important practical paper describes experiments on the production of castings of aluminium alloys with greatly diminished porosity, the method used being to free the alloy from dissolved gases by bubbling nitrogen through the liquid just before solidification, afterwards remelting. The inert nitrogen washes out the gases which give rise to blowholes, and sound castings result. This method has also been applied with success to other alloys. More than half of the volume is occupied by abstracts of work published elsewhere, and this section is invaluable to the metallurgist, the abstracting being done with remarkable thoroughness, so as to include research in pure physics and chemistry wherever it touches metals. The arrangement is clear, and the method of presentation is attractive.
The Journal of the Institute of Metals.
G. Shaw
Scott
Vol. 33. Edited by. Pp. xii + 710 + 15 plates. (London: Institute of Metals, 1925.) 31s. 6d. net.
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The Journal of the Institute of Metals . Nature 116, 816 (1925). https://doi.org/10.1038/116816a0
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DOI: https://doi.org/10.1038/116816a0