ORANGE-RED UNDERWEAR. 



539 



UPOX THE PHYSIOLOGICAL EFFECTS OF MOIST HEAT. 



Through the kindness of CajDtain P. L. Boyer, Medical Corps, ne were 

 enabled to make use of the bathrooms at the hospital at Los Bahos for 

 a series of experiments, the purpose of which was to show what effects 

 would be produced upon the human organism by exposure to a high 

 degree of heat and moisture. The subjects were volunteers from the 

 detachment of the Hospital Corps, stationed at the hospital. For the 

 purpose of the experiment one of the bathrooms was placed at our 

 disposal. This consisted of a room about 15 feet long by 8 feet wide 

 into which, at one end, opened a small steam room, this latter being 

 situated immediately above one of the hot springs. The temperature 

 could be raised by allowing hot water to run in the bathtub in the 

 large room, or by opening the door of the steam room to the necessary 

 degree, and by the same means the moisture in the atmosphere could 

 quickly be raised to the saturation point. The room was provided 

 with a small window at one side and a door at the end, both fitted 

 with slats, allowing quite a free draft across a section of the room and 

 keeping the whole place well ventilated. 



Four subjects, in good physical condition, were selected and these were sub- 

 jected, two at a time, to four hours in a temperature of from 92° to 98° F. as 

 recorded by a wet-bulb thermometer. The atmosphere was kept saturated with 

 moisture as evidenced by the dripping of water from the walls and by records of 

 wet and dry bulb thermometers. The subjects, clothed in suits of thin nainsock 

 underwear and socks, entered the bathroom where settees of rattan, upon which 

 they could recline, were provided. The experiments in each case were begun in 

 the early afternoon, soon after the noon meal. 



Subject No. I. — J. F., age 24 and weighing U f 6.5 pounds. 



Exposure. 



Room 

 temper- 

 ature. 



Pulse. 



Respi- 

 ration. 



Tem- 

 pera- 

 ture. 



Blood 

 pres- 

 sure. 





°F. 



92 

 92 

 93 

 94 

 94 

 95 

 95 

 95 

 94 



SO 

 SO 

 78 

 80 

 84 

 84 

 92 

 94 

 90 



18 

 IS 

 22 

 22 

 22 

 24 

 24 

 24 

 22 



°F. 



98. S 



99.2 



99.8 



100.0 



100.0 



100.2 



100.4 



101.0 



100.2 



vim. 

 135 



118 



Alter 30 minutes . 



After 1 hour ._' 







After 2J hours ... 







After 4 hours 





The subject lost 2.5 pounds in weight, and his strength as recorded by the 

 Brem ergometer fell off 48 per cent during the experiment. However, he was 

 able to record as strong a grip with a hand dynamometer after as before the 

 experiment. 



