448 J. C. Draper—Heat produced in the Body, 
condition immediately after leaving it, we find that in both 
experiments the exposure for one hour to water at a tempera- 
ture of about 74° F. lowered the temperature of the mouth 
of a degree of cold such as that employed, is to reduce the 
temperature of the body and the rate of respiration slightly, 
while it affects the rate of pulsation in a very profound 
manner. 
One of the consequences of this effect of cold on the action 
of the heart was a great reduction in the quantity of oxygen 
introduced into the system. The rate of pulsation — 
reduced nearly one-third, the quantity of oxygen convey 
into the interior of the body was diminished in a somewhat 
similar ratio. In a short time this began to exert its influence 
on the nervous centers, and there was a overwhelming disposl- 
tion to fall asleep, which was unconsciously indulged in in both 
experiments shortly after leaving the bath, notwithstanding the 
strong desire to keep awake for the purpose of recording the 
rates of pulse and respiration at given periods. 
Another evident consequence of such a sluggish movement 
of the blood is the disposition to congestion of various mterna 
organs, and herein we may see a partial explanation of the 
action of cold in causing inflammations, especially of those 
organs engaged in the processes of secretion and excretion. 
e discussion of the results obtained has thus far been con- 
metric indications. In the case of the respiratory movements 
it is also very difficult to avoid influencing them in the act 0 
co g th temperatures are, it is true, free from 
minations none of these objections can be urged; they are.con: 
siderable, and by counting for half a minute for every reco 
e, the error is reduced to a maximum of one beat. The 
movements of the heart are, in addition, free from the liability 
to error that exists in the case of the respiratory movements. j 
ecepting the pulse determinations as being accurate am 
Recollecting that 
and 3 that just 
