114 



ARON. 



The following experiments were arranged in order to show beyond 

 doubt that hyperthermia alone must be regarded as the true cause of the 

 death and of the injurious effects brought about by the radiation of 

 the sun. 



Monkeys were exposed to the sun, while at the same time a strong 

 current of air from an electric fan was blown over their bodies. Under 

 these conditions the temperature did not rise in the same degree as in 

 a control animal exposed at the same time, but outside the influence of the 

 fan. Monkeys in the sun but exposed to the wind behaved more or less as 

 did the animals under an umbrella^ or in the shade, no injurious effects 

 from the sun's rays being noticed, because the motion of the air increased 

 the loss of heat. When placed under the fan, the animals lost the exces- 

 sive heat which reached them by radiation from the sun. The rays, 

 including the ultra-violet, were nevertheless present and were absorbed 

 by the body in the same manner and degree as by that of the control 

 monkey. Table VI and Chart IV make the above experiments clear. 



Table VI. — Monkeys in the sun, with and without a blast of air from a fan. 



Date. 



Remarks. 



Time. 



Temperature of— 



Monkey X 



in sun and 



wind. 



Monkey 

 XIII in sun 

 and wind. 



Monkev 



Xlllinsiin 



alone. 



Monkey 



XIV in 



sun and 



wind. 



Monkev 



XIV in sun 



alone. 



Sub- 

 cuta- 

 neous 



Rec- 

 tal. 



Sub- 

 cuta- 

 eonus 



Rec- 

 tal. 



Sub- 

 cuta- 

 neous 



Rec- 

 tal. 



Sub- 

 cuta- 

 neous 



Rec- 

 tal. 



Sub- 

 cuta- 

 neous 



Rec- 

 tal. 



1911. 

 Jan. 24 



Jan. 26 



In animal 

 house 



a. m. 



9.50 



10.15 

 10.30 



8.30 

 8.45 



9.15 

 9.30 

 9.45 

 10.00 

 10.10 

 (10.30 

 110. 45 



11.10 

 11.20 

 11.30 

 11.40 



11.50 



p.m. 



1.00 



°C. 



°C. 



°C. 

 37.9 

 37.5 



°C. 



38.6 



39.4 

 39.3 



39.5 



°C. 



"C. 



°C. 



°C. 



38.7 

 41.5 



38.9 



40.3 

 40.9 



38.5 



39.7 

 41.0 

 41.8 

 42.5 

 42.7 



Exposed to sun 

 10 a. m 



Interrupted 



In animal 

 house . 









































" " 



Exposed to sun 

 9 a. m _ 



Interrupted 



In animal 

 house 







38.6 



39.3 

 38.6 

 39.2 

 38.7 











37.3 



40.6 

 41.1 

 42.2 







39.8 

 40.0 

 40.3 

 40.2 

 40.1 



























































43.5 



|36.8 



37.2 

 39.5 



38.2 

 39.3 





38.1 



39.0 



40.8 



42.4 



(44.8 

 Idled. 



38.5 



39.1 

 40.8 



1 



39.4 

 39.8 











Exposed to sun 

 10.50 a. m 







42.7 







39.6 







40.1 











44.8 

 46.3 







40.5 

 "39.8 







40.4 

 •40.6 





























» Left in sun under fan. 



