Scientific Intelligence. — Physiology. 41 B 
'make her take food, and immediately after slept > again. From 
the commencement of her sleep, she only wakened once of her 
own accord. All the functions, even the periodical evacuation, 
are regularly performed ; the heat and pulse presented nothing 
particular. No cause could be discovered for this extraordinary 
sleep, unless it might be a hurt which she had previously re- 
ceived on the head. Two physicians are observing the case at- 
tentively. 
18. Quantity of Plood in Animals. — Those who have not 
considered the subject, must be surprised at the quantity of 
blood which passes through the heart of any moderately sized 
animal, in the course of twenty-four hours. In man the 
quantity of blood existing in the body at any given moment is 
probably from 30 to 40 pints. Of this, an ounce and' a half, or 
about three table spoonfuls are sent out at every stroke ; which 
multiplied into 75, (the average rate of the pulse) give, 112.5 
ounces, or seven pints in a minute ; i. e. 420 pints, or 52.5 gal- 
lons, in an hour; and 1260 gallons, i. e. nearly 24 hogsheads in 
a day. Now, if we recollect that the whale is said to send out 
from its heart at each stroke 15 gallons, the imagination is over- 
whelmed with the aggregate of the quantity that must pass 
through the heart pf that animal in twenty-four hours. It is a 
general law, that the pulse of the larger animals is slower than 
that of the smaller : but even if we put the pulse of the whale 
so low as 20 in the minute, the quantity circulated through the 
heart, calculated at 15 gallons for each pulsation, will be 432,000 
gallons, equal to 8000 hogsheads in twenty-four hours. The 
consideration of this amazing quantity is however a subject of 
mere empty wonder, if not accompanied with the reflection, that, 
in order to produce the aggregate amount, the heart is kept in 
constant motion ; and that, in fact, it is incessantly beating, as 
it is termed, or throwing out the blood into the arteries, from the 
first period of our existence to the moment of our death, without 
any sensation of fatigue, or even without our consciousness, ex- 
cepting under occasional corporeal or mental agitation. — Dr Kidd, 
19- On the Causes of Animal Heat. — The following are 
some of the conclusions obtained by M. Despretz, during the 
course of his experimental investigations of the causes of animal 
heat; 1. Respiration is the principal cause, of the development 
