Alfalfa in Kansas. 



317 



upright, one end being secured by a rope or cable to the base of the up- 

 right, while the fork is used on the other end. 



This type of stacker can not be used to build very high stacks, as the 

 weight, being carried at the end of the boom, has a tendency to tip the 

 stacker over. 



The stackers which have a tall upright, and the boom hinged by one 

 end at a distance slightly less than the length of the boom from its top, 



have the upright held in position at 

 the top by guy lines, which are 

 screwed to a ring. The base of the 

 upright is set in a socket made in a 

 skid, so the back of the stacker can 

 be moved without lowering it to the 

 ground. The boom is held in posi- 

 tion by a rope and tackle running 

 from its outer end to the top of the 

 upright. This allows the boom to be 

 raised and lowered from the ground. 

 The upright is bent a little over the 

 stack, so the loaded fork tends to 

 swing around over it. 



This type of stacker may be used 

 to build stacks up to 35 or 40 feet in 

 height, and is used where wagons 

 are unloaded with slings or forks. 



OPERATION. One end of the rope 

 which raises the fork is screwed to 

 the end of the boom and runs down 

 through a pulley fastened to the 

 fork, then back up over a pulley 

 fastened to the end of the boom, 

 then through a pulley secured to the 

 upright at the base of the boom, and 

 then over a pulley at the base of the 

 upright and out along the side of the stack to the horse. (See "Stacker," 

 in index.) 



Hay Loaders. 



In general there are two types of hay loaders. The fork loader and 

 the endless apron loader. The former has a series of forks and oscillat- 

 ing arms, which are driven by chains, gears or cranks from the wheels, 

 which take the hay off of the ground and force it up a carrier onto the 

 wagon. The latter has a cylinder with protruding teeth, which takes 

 the hay off the ground, and it is then raised up on an endless apron. 

 (See "Hay Loader," in index.) 



Forks. 



There are at least four types of hay forks in use, each of which is 

 adapted to certain conditions. The single harpoon has a single tine with 

 spurs which stand out at right angles to the point. These are tripped 



FIG. 259. Pole and boom stacker. 



