Abstract :
The 40th anniversary of the Institute was fittingly celebrated during the Philadelphia Midwinter Convention at a meeting held Monday evening, February 4th, at which President Harris J. Ryan presided. Addresses were delivered by Elmer J. Sperry, T. Commerford Martin and Elihu Thomson, all charter members, and by John J. Carty, past-president of the Institute. President Ryan presided, and in opening the meeting said:
