Abstract
The thermistor (thermally sensitive resistor) provides a readily available instrument for temp. measurement and control inherently superior to instruments now in use. It is small, inexpensive, and yet highly sensitive to changes in temp. This paper reviews the general properties, applications, and methods of use of thermistors to physiological temp. investigations, and describes a technic using a 0.4 mm. diam. thermistor bead for high sensitivity (0.01[degree] C) contact thermometry in the field.