Before the program begins, Jerome Spingarn, on the Board of the National Association for Better Radio and Television, presents to Lynn Poole the television award for Outstanding Educational Program for the second consecutive year. As an introduction to the show, Mr. Poole reads from Sir Charles Blagden's 1774 "Experiments and Observations in a Heated Room," about the dangers of overheating. Dr. Lee then describes the operation of Johns Hopkins University's Mobile Climatic Laboratory, built for the Quartermaster Corps. The lab consists of an engine room with generators, an anteroom with controls, and a climatic chamber with treadmill and other equipment. Test subjects are wired to provide data to a recorder as they exercise on a treadmill under different temperature and humidity levels. Oxygen analysis and perspiration evaporation measurements are also explained. Dr. Lee shows a film and photos of graduate students doing preliminary testing of the lab's equipment before its use in the Yuma, Arizona desert.