Abstract
THE accurate measurement of the mean rate at which a gas is flowing at any instant through a definite area or relative to a fixed body presents serious difficulties, but is of considerable importance in connexion with many scientific and practical problems. The first edition of Mr. Ower's book, in which various types of instruments used for determining air flow velocities were described and the theoretical basis of their design discussed, met a real need. Advantage has been taken of the new edition to make revisions and add certain new matter, the most important of which gives details of the German standard nozzle for measuring air flow along a pipe. A table of coefficients is given for various ratios of the area of the nozzle and the area of the pipe, and the limiting values of vdfv for which these coefficients are stated to be reliable, within an accuracy of 0-5 per cent, is given.
The Measurement of Air Flow.
By E. Ower. Second edition, revised and enlarged. Pp. viii + 243. (London: Chapman and Hall, Ltd., 1933.) 15s. net.
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[Short Reviews]. Nature 132, 558 (1933). https://doi.org/10.1038/132558a0
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DOI: https://doi.org/10.1038/132558a0