Abstract :
Authors´ closing discussion of a paper published in the October 1934 issue, pages 1389–96, and in the November 1934 issue, pages 1498–1503, and presented for oral discussion at the cables session of the winter convention, New York, N. Y., January 24, 1935. Other discussions of this paper were published in the March 1935 issue, pages 322–4, and in the April 1935 issue, pages 431–4.
