1873.] 



on the Temperature and Circulation. 



381 



is capable of drawing upon another at a time of exigency. (9) That the 

 dynamic test is indispensable to ascertain the lasting power of the heart, 

 the tone of the vessels, and the validity of the nerve-centres regulating 

 the temperature ; in fact to gauge the radical as distinguished from the 

 acting forces. (10) That the capacity to endure fatigue well indicates, 

 ca&teris paribus, a like power to endure disease well. 



Observation A. — A man, set. 54, walked twenty-two miles, halting at the 

 end of ten for rest and food. The tracing taken on co min g in (6) was much 

 smaller than that taken before starting (a). The temperature some 

 minutes later was only 35°-4 C. (95°* 72 E.) ; an hour later, after rest and 

 food, it was 36°-2 C.=97°-16 F. 



