Book Review | Published:

[Short Notices]

Nature volume 140, page 637 (09 October 1937) | Download Citation



THIS new addition to Messrs. Methuen's well-known series of monographs is devoted to the principal methods used for the measurement of frequency and circuit constants for alternating current in the audio and radio frequency range. Its main contents are as follow: introduction to the treatment of A.C. circuits by vector methods and complex notation, measurement of inductance (self and mutual), capacity and frequency at audio frequencies, mainly by the use of bridge methods, including, however, a special chapter on A.C. potentiometers ; measurement of the same magnitudes at radio frequencies by resonance methods. The author, who with the 'Owen bridge' has himself made a definite contribution to the subject, has succeeded in presenting the matter with agreeable shortness, outlining well the points which should be observed in the experimental procedure. Numerous examples, worked out in detail, add to the usefulness of the book by illustrating the order of magnitudes and errors encountered.

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