108 



ARON. 



In the shade, or inside of a room, 



Time 



7" 



815 



835 



8 55 



rr^ 



935 



955 



Temp 

 46° 



45° 



4 4° 



4 3° 



4 2° 



41° 



40° 



3 9° 



3 8° 



37° 



3 6° 



3 5° 







































f 



















t 









f 



1 













/ 



/ 













(J 



/ / 



/ 











/ 



/ 













4 



r 











^ 













o..^ 







i 













1 





(abbi 













\ 



tlV 







46° 

 45° 

 4 4° 

 43° 

 42° 

 41° 

 4 0° 

 3 9° 

 3 8° 

 3 7° 

 36° 

 35° 















































































































































« — 







■o--'' 















^abbi 













v 







Subcutaneous 



Chaet I. 



R«ctal 



a tracheotomized dog, while limited 

 in its power of losing heat, shows 

 a body temperature not above 

 normal, but if such an animal is 

 brought into the direct rays of the 

 sun, the hyperpnoea appears just 

 as with a nonnal dog but without 

 so great an evaporation of water. 

 Under these conditions the rectal 

 temperature rises to febrile heights. 

 If the expei'iment is continued for 

 a longer time, the animal finally 

 falls and dies, the respiration 

 having markedly increased, the 

 pulse greatly quickened, cyanosis 

 of the mucous membrane having 

 set in, saliva dropping from the 

 mouth and secretion even having 

 set in from the mucous membrane 

 of the nose. In fact, the animal 

 shows all the symptoms of heat 

 stroke. I have several times in-- 

 teiTupted the experiment before 

 this last stage was reached. Then, 

 if the temperature was not too 

 high, it was possible to save the 

 animals. The animals died in two 

 experiments; one, after a few 

 minutes, the other after several 

 hours in spite of careful treatment 

 with cool water. During this time 

 the animal exliibited signs of 

 disturbed orientation; it ran rest- 

 lessly around, knocked its head 

 against the wall, fell and jumped 

 up again. These severe disturb- 

 ances of the nervous system cor- 

 respond to certain observations 

 made during heat stroke in man. 

 The conditions described above 

 are made clear by Table III, 



