Thornton, William E. (William Edgar), 1929-2016-03-182016-03-181972http://hdl.handle.net/2152.3/591Graph showing the changes in body mass before, during, and after flight simulation for "SPT" (Simulation Support, Dr. William Thornton).Space medicine.Space flight--Physiological effect.Weightlessness--Physiological effect.Skylab Program.Figure 2.4.3-3. Body Mass SL 1/2 SPT.Image