Ventilation and Comfort

Abstract

THE Medical Research Council has published a report on the “Methods of Investigating Ventilation and its Effer.cs,” by H. M. Vernon and others (Special Report Series, No. 100: Methods of Investigating Ventilation and its Effects. London: H.M. Stationery Office, 1926, 2s. net). Part i contains descriptions of two new instruments for the measurement of variations (a) in the velocity and (6) in the temperature of air currents. For the former purpose a new form of hot-wire anemometer was constructed which is very sensitive to changes of air velocity, while influenced little by changes in temperature. For the latter purpose a suitable thermopile was devised which was unaffected by changes in velocity. The combined use of these two instruments has thrown further light on the relative importance of temperature and air movement in ventilation. In Part 2 the results of a further calibration of Leonard Hill's kata-thermometer are given, which allow low-air velocities found in ordinary rooms to be measured with far greater accuracy.