Abstract
LONDON.
Royal Society, March 15.¢Sir J. J. Thomson, president, in the chair.¢Prof, T. H. Havelock: The initial wave-resistance of a moving surface pressure. Hitherto the wave-resistance associated with the motion of an assigned pressure system over the surface of water has been studied only in the steady state for uniform motion. The present work is an attempt to calculate this quantity at any time for a system which has been suddenly established and set in uniform motion at a certain instant.¢Prof. S. W. J. Smith and H. Moss: Experiments with mercury jets. (i) The relation between the jet- length and the velocity of efflux. (ii) A comparison with jets of other iiquids. It has probably been noticed by those who have worked with mercury ¢dropping electrodes ¢¢in which the mercury issues in a narrow stream from the drawn-out end of a vertical tube¢that the length of the jet alters in a peculiar way with the length of the mercury column producing it. The results of a study of this phenomenon are given¢Prof. W. H. Young: The mode of approach to zero of the coefficients of a Fourier series.
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Societies and Academies . Nature 99, 96–100 (1917). https://doi.org/10.1038/099096a0
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DOI: https://doi.org/10.1038/099096a0