The more recent developments of the bell telephone laboratories

On the evenings of Tuesday and Wednesday, November 19 and 20, 1930 the New York Section of the Institute will hold a joint meeting with the New York Electrical Society and the Museums of the Peaceful Arts. On each of the two evenings there will be a lecture and demonstration entitled “Play-o-fine Crinkanope” by Sergius P. Grace, Assistant Vice-President, Bell Telephone Laboratories, Inc. Many of those who have previously had the pleasure of listening to Mr. Grace will recognize in the cryptic title to this lecture the hint that he will again demonstrate the scrambled speech apparatus. Other demonstrations will include the electric brain, delayed speech, electro-stethoscope, hearing without sound, the dial that speaks and many others. The lecture, which will review the most recent developments of the Bell Telephone Laboratories, will be presented by Mr. Grace in the usual simple but dramatic manner.