The process of chewing is carefully studied in its relation to pulse rate, metabolism, mastication and muscular tension; to strain and relaxation, writing pressure, speed and accuracy of typing, and output of routine work. The author's conclusion (p. 90) is that chewing serves as a means of reducing tension, and to some degree redintegrates the relaxation of mealtime. The remaining parts of the picture follow from this redintegrated posture of relaxation.