CHURNING AND WASHING BUTTER. 249 
seasons of the year. In the spring, when rains are frequent 
and heavy, unwholesome surface-water is likely to seep in 
through the sides. Such wells may also serve as traps for 
small animals. The presence of an animal in the well is sure 
a MSS 
fines 
Toe 
Le igs 
Zy Zip Z 
fos GLEE 
CLL. LL LE ts FLA EELELIEELLEEID 
Fie. 151.—The shallow barnyard well with privy-vault and manure heaps 
near by. The water is likely to be contaminated from these any time. 
(Farmer’s Bul. No. 43, U. 8. Dept. of Agriculture.) 
to cause undesirable odors and a multitude of undesirable and 
putrefactive organisms. 
Water from deeply drilled wells, even if it is pure in so far 
asits germ-content is concerned, is in many cases turbid and 
sandy, and needs to go through a process of purification as much 
as does the shallow well-water. 
