THE DOUBLE DASHER. 



317 



rature. In summer the heat may delay, or render the 

 operation difficult, and in winter the coldness presents 

 obstacles. A transportable churn can be moved into a 

 cool place in summer, and a warm one in winter, when 

 it is desirable. The dasher of the churn is also seen 

 separate in the same figure. 



The Dog-power Churn, Fig. 107, economizes labor, 

 while, at the same time, more butter is obtained, on 

 account of the uniformity of the agitation produced. It 

 is in use in all the Dutch provinces. The form and size 

 of the churn are comparatively indifferent ; but the 

 tread-wheel and direction of the moving power are the 

 important points. The diameter of the wheel is from 

 ten to twelve feet, and the rim or outer circumference 



is made of boards two 

 feet wide. The weight 

 of the animal turns the 

 wheel and moves the 

 dasher by means of 

 cogs, as shown in the 

 figure. 



Where there is a 

 sufficient supply of 

 moving power, a churn 

 with two dashers is 

 sometimes attached, as 

 shown in Fig. 108, in 

 which case one dasher 

 moves down while the 

 other is raised. 



A large and strong 



dog is required, and' 



he is easily taught to 



keep to his work, by beginning with short trials, and 



gradually lengthening them. A steady and uniform step 



27* 



