490 FARM ANIMALS 
farm animals are kept, a reasonable amount of exercise 
should be required. Even work for boys and girls is not a 
hardship, but a blessing, that remains as long as life exists. 
4. Sunlight.—Sunlight is a great stimulant to the skin 
and acts as a tonic to the red blood corpuscles. Men 
and beasts that live in darkness or dark quarters become 
debilitated and finally become victims of disease. Just 
as the plant obtains its green color only from sunlight, 
so does the healthy, red blood of animals form only 
through the influence of sunlight. Sunlight is a neces- 
sity to the healthy as it is to the sick. City people who 
work in dark shops or live in dark dwellings, and animals 
that are stabled in dark barns, live under unhealthy con- 
ditions. Sunny, large and airy buildings are important 
requirements for both people and live stock. Sunlight 
is not only of great importance to health in a direct man- 
ner, but it is the very best disinfectant. Disease germs 
cannot live where the direct rays of the sun strike. Every 
WHERE SUNLIGHT Hits Every NooK AND CORNER 
In quarters like this there is no place for vermin to hide or for disease germs 
to breed, 
