Captain Loeb is, in civil life, Professor of Physics at the University of California at Berkeley. Trained at California, Columbia, and Manchester, England, he has S.B. and Ph.D. degrees from the University of Chicago. The author of eight books on Physics, lie is an internationally known expert on the conduction of electricity and electrical discharge in gases. After duty in the Air Service, A.E.F., World War I, he joined the Naval Reserve in 1924. He was in charge of construction, staffing, and equipping of a research laboratory at the Naval Proving Ground in 1941, and organized the degaussing service in the 12th Naval District. He is now on duty as Assistant to the Officer in Charge of the Naval Ordnance Laboratory.