Fick and Wislicenus, on source of muscular energy, [121]

Fischer, Emil, [21]

Fisher, Irving, on endurance and low proteid diet, [210]

on method of indicating food values, [283]

Folin, Otto, theory of proteid metabolism, [144]

Food, absorption and utilization of, in dogs on low proteid diet, [261], [262]

amounts, required for proteid needs of body, [274]

as fuel, [6]

as source of energy, [15]

availability of, [12]