306 CREAMERY BUTTER MAKING 



shafting in a plane parallel to the floor. This plane is in- 

 dicated by the line ab in Fig. 92. Next determine the posi- 

 tion of the shafting in a plane at right angles to the floor, 

 indicated by the line cd. This is done as follows : Loosely 

 fasten the hangers along the white chalk line and properly 

 fasten the shafting. Now hang on the shafting, at inter- 

 vals of three feet, pieces of board like that shown in Fig. 

 93. The upper end is rounded to fit over the shaft, while 

 the lower end is perforated as indicated by the dot. These 

 pieces of board must be carefully cut so that the distance 

 P is the same in all. If the holes at the lower ends are all 

 in line the shafting is properly lined up. If not, the shaft 

 needs readjusting. 



