The basic law of the wet-and-dry-bulb hygrometer at temperatures from 40 to 100 C

The relation between relative humidity and wet-and-dry-bulb readings, at dry-bulb temperatures between 40° and 100°C., has been studied experimentally. The relative humidity was measured both by absorbing and weighing the moisture in a known volume of air, and by the dew-point method. The results are finally expressed by means of a skeleton table for the wet-and-dry-bulb hygrometer in the temperature range referred to.