Under the administration of Frank Warren Garran (dean of the School from 1933 to 1945), Thayer experienced extensive expansion and modernization. Thayer's curriculum expanded to incorporate mechanical engineering and electrical engineering, as well as a dual business/engineering administration degree from the Tuck School of Business. Garran also oversaw the establishment of Cummings Hall, the Thayer School's first dedicated physical plant, and the institution of the school's first major research program, which was in radiophysics. Dean William P. Kimball (1945–61) continued the school's growing emphasis on research and established the first master's degrees for students wishing to earn more than a Bachelor of Engineering.