New York section to hear lecture on waves and crystals

On the evening of Tuesday, November 13th, the New York Section of the Institute will hold its first meeting of the administrative year 1928–29. Dr. Karl K. Darrow, of the Bell Telephone Laboratories, will give a lecture on “Crystals and Waves.” This address of a semi-popular character, will be an account of the interactions of crystals with X-rays and electrons, showing that crystals are periodic arrangements of atoms and that electrons and X-rays are periodic similar waves. The talk will be illustrated with lantern slides.