The four phases of heat-production of muscle.

Hill and Hartree made valuable contributions to the knowledge of the thermodynamics of muscle. See also Physiol. Rev., 1922, 2, 310-41, and Hill, A. V., Trails and trials in physiology: a bibliography 1909-1964, 1965.

In 1922 Hill shared the Nobel Prize in Physiology or Medicine with Meyerhof "for his discovery relating to the production of heat in muscle."