Abstract :
Discussion and authors´ closure of paper 41–121 by W. M. Hanna, H. A. Travers, C. F. Wagner, C. A. Woodrow, and W. F. Skeats, presented at the AIEE summer convention, Toronto, Ontario, Can., June 16–20, 1941, and published in AIEE TRANSACTIONS, 1941 (September section), pages 877–81.
