APPENDIX E 269 



Notice that no matter what the temperature, the degree of dis- 

 comfort increases with higher humidity, that is, the hythers in each 

 line become higher as one passes from left to right. 



The second set of experiments was carried on by Affleck and Knapp 

 at the Y. M. C. A. Training School at Springfield, Mass. They took 

 a comfort vote after a class of young men had been exercising for 

 about an hour and a half. Their scale of hythers consisted of only 

 three points: (1) too cool, (2) just right, and (3) too warm. In the 

 table, 30 means just right, while anything lower is too cool, and any- 

 thing higher too warm. During the experiments the temperature 

 ranged from 53° to 70° and the humidity from 20 per cent to 80 per 

 cent. As a rule the temperatures and humidities were both much 

 lower than those of Tyler. The results are as follows: 



Temperature 40% or Less 41-60% 61% or More 



Relative Humidity Cases Hyther Cases Hyther Cases Hyther 



66°-70° 16 37.6 11 41.1 5 42.5 



61''-65° 29 34.1 39 34.3 4 28.7 



56°-60° 1 27.2 4 26.7 3 20.6 



For temperatures between 66° and 70° this table agrees with that 

 of Tyler. Thus for all temperatures above the optimum there is 

 agreement. For lower temperatures the data are not conclusive. 

 Between 61" and 65° the air felt cooler at humidities below 40 per 

 cent than at humidities of 41 per cent to 60 per cent. The difference 

 between 34.1 and 34.3, however, is too slight to be important. At 

 slightly higher humidities with a temperature of 61° to 65°, and at 

 temperatures below 60° the table suggests that dry air feels warmer 

 than that which is even moderately moist. The number of cases, how- 

 ever, is altogether too small to be conclusive. In passing, it is inter- 

 esting to note that the young men at the Y. M. C. A. gymnasium felt 

 most comfortable at a temperature of about 58° when the humidity was 



