Discussion on “test of an artificial aerial telephone line at a frequency of 750 cycles per second” (Kennelly and Lieberknecht) and “the adaptation of automatic methods to long distance telephone toll switching” (Friendly and B

F. K. Vreeland: In view of what Mr. Colpitts has just said about the values of tables III, IV and V being computed, not from the actual constants of the line given in Tables I and II, but from empirical constants derived by experiments with the line as a whole, and worked back from Table VIII; I would ask whether he can give us any information as to the agreement of these empirical constants with the actual measured constants of the line?