Books Received | Published:

The Collected Papers of George Ashley Campbell, Research Engineer of the American Telephone and Telegraph Company

Nature volume 142, page 591 (01 October 1938) | Download Citation



DR. G. A. Campbell, who has recently retired from active service with the American Telephone and Telegraph Company, is well known to telephone engineers for his many contributions to the theory and practice of telephony. One of his best-known inventions is the 'wave filter' which bears his name, by means of which the harmonics in the electromotive waves produced by a generator are effectively suppressed by means of a multiple system of condensers and inductances. To commemorate his retirement, the American Telephone and Telegraph Company has issued this handsome volume of his collected papers. The representative of this company in Great Britain has written stating that requests for copies of the book will be entertained so long as the somewhat limited number of volumes printed lasts. Requests should be addressed to Dr. L. F. Morehouse, American Telephone and Telegraph Company, Bush House, London, W. C.2.

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