CHURNING AND WASHING BUTTER. 255 
If the intermittent process is used, the first water filtered 
after the intervening period should not be used. During the 
intermission, or during the time that the water is shut off, 
germs develop and come through the filter-bed with the water 
that is filtered. 
Advantages of Purifying Wash-water for Butter.—The chief 
advantage of purifying wash-water for butter is that the keeping 
quality of the butter is improved, and if the proper skill and 
care have been applied in the other steps of manufacture, a pure 
sanitary product is obtained. The sanitary efficiency reached 
by purifying the wash-water constitutes no small consideration. 
Germs producing contagious diseases are thus checked from 
spreading. 
