Definitions of power and related quantities

Discussion and authors´ closure of a paper by H. L. Curtis and F. B. Silsbee published in the April 1935 issue, pages 394–404, and presented for oral discussion at the instruments and measurements session of the summer convention, Ithaca, N. Y., June 25, 1935. Other discussion of this paper was published in the October 1935 issue, pages 1120–1.