Abstract
Historical and critical review of methods for the detection and determination of orthophosphoric acid, pyrophosphoric acid, phosphagen (related to creatin phosphoric acid), hexose diphosphoric ester, hexose monophosphoric ester, adenylic and inosinic acids, and of opinions concerning the function of each in muscular contraction. Among the topics included are: diffusion studies; muscle pulps as anaerobic fermentation systems; glycolysis in cell-free extracts of muscle; myothermic considerations.