A. I. E. E. lectures on radioactivity

It has been found necessary to change the dates for the series of lectures on “Radioactivity” to be given by Professor Edwin P. Adams of the Palmer Physical Laboratory of Princeton University, under the auspices of the Electrophysics Committee of the Institute, of which preliminary announcement was made in the February Proceedings. The lectures will be given at 8:15 p.m. on Wednesday evenings, March 19 and 26, and April 2 and 9, in the auditorium of the Engineering Societies Building, 33 West 39th Street, New York.