CHURNING 



The chief cause of the change trom the relatively soft but- 

 ter in summer to firm butter in winter is unmistakeably the 

 change from green pasture to dry feed. This is most con- 

 clusively brought out in the following table : 



Table 47. Effect of Dry Feed versus Blue Grass Pasture on 



Mechanical Firmness of Butter and Its Relation to the 



Butter Fat Constants. 1 



In Table 47 is shown the relation of the mechanical firmness 

 to the moisture content of butter, average volume of fat globules 

 and butter fat constants, as affected by the change from dry 

 feed to blue grass pasture. 



1 Hunziker, Mills and Spitzer, Moisture Control of Butter, Factors not 

 under Control of the Buttermaker, Purdue Bulletin 159, 1912. 



