Abstract :
Saul Dushman: I am going to ask you to take your mind away from the purely material problems of lighting streets, railway yards, etc., and consider, with me, the production of light by the atom. Our present views on the production of light originated with a Danish physicist, Niels Bohr, in the year 1912. So much has been published and written about this theory that I am afraid I will be repeating a great deal of what is probably quite familiar to a number of you. Nevertheless, I am going to present a sort of bird´s eye view of the theoretical side of the problem with which Mr. Foulke will deal from a practical side.
