THE HAND BUTTER-MILL. 



315 



g. 104. 



ventilator, Fig. 105. This consists of eight wooden 

 wings, pierced with holes, and motion is communicated 

 to it by means of the wheel, b, connected bv the 



Fig. 105. 



cord to the larger windlass. The wings of the machine, 

 when set in motion, strike incessantly in the cream, and 

 so powerfully that the whole mass is agitated, and in this 

 manner the separation of the butter particles is soon 

 effected. The motion is so rapid that it is often neces- 

 sary to turn the crank very slowly, especially just as the 

 butter is coming. 



Valk's Hand Butter-Mill, Fig. 106, has many ad- 

 vantages. It is less fatiguing to work than the old- 



