Edited sentence: After Vaughan left for the Tennesee Valley Authority in 1940, Henry Bunger (head of the Chemistry Department) took over as acting director.Director Vaughan had initially prepared the staff for fewer incoming contracts, but increased support from outside agencies eventually counteracted the significantly decreased appropriation from the Board of Regents.However, Bunger died shortly thereafter in the summer of 1941, and physics professor Gerald A.Rosselot assumed the directorship.Some projects undertaken under Vaughan's directorship included helicopter research, the Georgia Economic Survey, $6,000 in aeronautical research for the Guggenheim Foundation, and textile research that created cotton roving and spinning processes that were three to five times faster than contemporary practices.The electronics and communications research that he attracted is still a mainstay of GTRI research.Vaughan was instrumental in securing a permanent building for the station, initially known as the Research Building; several years later it was expanded and named the Thomas Hinman Research Building.World War II resulted in a dramatic increase of sponsored research, with 19.being the first year that outside contracts exceeded the station's other income (most notably, its appropriation)