Doctor R. A. Millikan to speak on “high-frequency cosmic rays”

The members of the New York Section of the A. I. E. E. and the New York Electrical Society are to have the wonderful opportunity of again listening to an address by Dr. R. A. Millikan, Director, Norman Bridge Laboratory, California Institute of Technology. Dr. Millikan will desoribe his recent work in the detection of “High-Frequency Cosmic Rays,” carried on at Lake Muir at the summit of Mt. Whitney and Arrowhead Lake in the San Bernardino mountains, also on Pike´s Peak in which he determined that these rays, at first called “penetrating radiation” of the atmosphere, come definitely from above. The shortest wave length determined corresponds to a frequency 10,000,000 times higher than that of visible light and that the computed frequencies correspond closely to the energy involved in the simple capture of an electron by a positive nucleus.