KEEPING ANIMALS TIEALTHY 491 
room where a boy or girl sleeps and every stall where 
an animal is quartered should be reached in every corner 
by sunlight during some part of the day. It is an old 
saying that “where the sun does not enter, the physician 
does.” 
5. Water—Sixty per cent or more of the weight of the 
animal body consists of water; and this quantity must be 
maintained by a large 
daily consumption if 
good health is to be 
preserved. The action 
of water is mechanical, 
chemical and thermal. 
Mechanically, it dis- 
tends the stomach, in- 
testines and other or- 
gans; chemically, it Mc fy 
dissolves certain inju- PERMANENT WATERING TROUGH 
rious substances cir- 
culating in the body; and thermally, it reduces the pulse 
and lowers the temperature. 
Drinking water should be absolutely pure, or it may become a men- 
ace to health. Many disastrous outbreaks of disease often are due to 
water contamination, as, for instance, typhoid fever and hog cholera. 
Farm animals are entitled to a better water supply than they fre- 
quently get. Wells, springs, cisterns and cool streams are satisfac- 
tory, providing they do not become contaminated in any manner by 
disease germs. It is also important that live stock be watered at 
regular intervals, that they be given water in abundance, and be 
allowed to drink in their own way, with plenty of time to do it. 
6. Disinfection—The best way of reducing the pos- 
sibilities of contagion is by destroying offending germs. 
Such practice is not only absolutely necessary during 
and after an outbreak of disease, but during other periods 
when danger is not even suspected. On farms where 
disinfection is freely indulged in, and where stock are 
