Abstract :
Discussion of a paper by Alex Dow published in the December 1934 issue, pages 1589–91, and presented for oral discussion at the education session of the winter convention, New York, N. Y., January 22, 1935. H. D. James (Westinghouse Elec. and Mfg. Co., Detroit, Mich.): I read this paper with considerable interest, particularly as I know the author´s background, which makes his statements of unusual value to me.
