From our observations I think the following propositions are justified: (1) All muscular movements are made up of a series of elementarycontractions and relaxations in alternation, which may be appreciable as tremor in conditions of both health and disease. (2) The differences between different tremors are of degree rather than of kind, i. e. no one form of tremor is distinctive of any one disease or group of diseases. (3) No definite relation exists between one form of tremor and any other. (4) The frequency of movement is in inverse ratio to the amplitnde and vice versâ. (5) Habitual movements are performed with greater freedom from tremor than unusual movements. (6) There is no material difference between the movements of the two sides of the body, except as related to Proposition (5).