Abstract :
Discussion and authors´ closures of paper 46–77 by R. B. Bodine, S. B. Crary, and A. W. Rankin and paper 46–74 by H. A. P. Langstaff, H. R. Vaughan and R. F. Lawrence, presented at the AIEE winter convention, New York, N. Y., January 21–25, 1946, and published in AIEE TRANSACTIONS, 1946, May section, pages 290–7 and 246–53.