A COMPARISON OF THE CUMULATIVE DISCOMFORT INDEX (CUM. D.I.) AND CUMULATIVE EFFECTIVE TEMPERATURE (CUM. E.T.), AS OBTAINED BY METEOROLOGICAL DATA

Abstract During a 24-days' march traversing several regions differing in climatic conditions, in August 1959, two methods for the comparison of the heat load on separate days were investigated. The Cum. E.T. which was based on the sum of E.T. degrees for each hour of the day and night, and Cum. D.I. based on the sum of D.I. values (modification of the method of Thorn) for each hour of the day and night. Both methods were found equally suitable, but the Cum. D.I. method has the advantage of simples measurement and calculation, as compared with the Cum. E.T. method which necessitates the use of more instruments, tables and calculations.