Grandjean, Chapter 17. Kantowitz and Sorkin, pp. Its Evaluation and Control, Chapters 30 and 31. For full citation, refer to the appendix. To demonstrate the internal temperature regulation of the body.
Body temperature is a function of work.
Digital Thermometer 3.2.2. Axillary region 3.3.1.2. Inside shoe 3.3.1.4. Back of hand 3.3.1.5. Measure temperature at rest for 5 min.