CREAMERY BUTTER MAKING 133 



in Fig. 34, illustrates a very convenient and satisfactory 

 measuring device. The measuring is done by means of a 

 long hollow shaft, N, which consists of two boards be- 

 tween which a pointer, M, is made to slide. Attached to 

 the pointer is a string which passes over pulleys, O and P, 

 and ends in the buttermilk can where it is attached to a 

 wooden disc floating on top of the buttermilk. As the 

 buttermilk flows into the can the disc rises, causing the 

 pointer to sink in the shaft. Marks on the shaft indi- 

 cate the number of pailfuls measured out. 



