Size and Character of Fat Globules, 139 
the churn. This will be found to correspond to a 
motion of the particles of cream of about 700 feet per 
minute. 
The quality of the globules of fat.—The quality of 
the globules of fat, both as to their size and char- 
Fig. 17. Square box power churn. 
acter, bears an important part in the phenomena 
of churning. So far as the hardness or softness of 
the fats are concerned, this has already been treated 
of under the effect of temperature; but temperature 
is not the only influence which causes variation in 
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