HANDLING THE HAY CROP 



175 



An ordinary horse fork and tackle is used to hoist the 

 hay. Three single pulleys are attached, one to the 

 outer end of the boom, one near the top of the mast, 

 and the other at the bottom of the mast so that the rope 

 passes easily and freely through the three pulleys and 

 at the same time permits the boom to swing around as 

 the fork goes up from the wagon rack over the stack. 

 This swinging movement is regulated by tilting the 

 derrick towards the stack so that the boom swings over 



Figure 155. Gambrel Whiffletree, for use in hoisting hay to pre- 

 vent entanglements. It is also handy when cultivating around 

 fruit-trees. 



the stack by its own weight or by the weight of the hay 

 on the horse fork. Usually a wire truss is rigged over 

 the boom to stiffen it. The wire is attached to the boom 

 at both ends and the middle of the wire is sprung up to 

 rest on a bridge placed over the stirrup. 



Farmers like this simple form of hay derrick because 

 it is cheaply made and it may be easily moved because 

 it is not heavy. It is automatic and it is about as cheap 

 as any good derrick and it is the most satisfactory for 

 ordinary use. The base is large enough to make it solid 

 and steady when in use. Before moving the point of 

 the boom is lowered to a level position so that the der- 



