Swivel-headed Churn Staff. 



each vane is cut, so as to be inclined to the plane in 

 which all four lie, in the same manner as the sails of a 

 windmill, as is well explained by figs. 2 and 3. When 

 the beater is moved up and down through the cream, 

 its action upon the oblique vanes causes it to turn round 

 upon a pin above mentioned, as a centre, a, Fig. 1, 

 is a small wooden bolt sliding in a groove made in the 

 churn staft', KL ; its end shuts into a hole b, fig. 2, 

 made in one of the vanes ; when this bolt is pushed 

 down, it prevents the vanes from turning round, for 

 the purpose of collecting the butter together at the top 

 of the butter-milk when the churning is done. 



