Thornton, William E. (William Edgar), 1929-2016-03-182016-03-181972http://hdl.handle.net/2152.3/606Graph showing the change in body mass over the course of the SL-3 SMEAT flight simulation for "SPT" (Simulation Support, Dr. William Thornton)Space medicine.Space flight--Physiological effect.Weightlessness--Physiological effect.Skylab Program.Image