FARM MACHINERY 253 



data the cost of harvesting and shocking an acre is made up 

 in the following items: 



Cost of machine and interest on investment . . . $.29 per acre 



Driver and team 46 per acre 



Twine 305 per acre 



Shocking 448 per acre 



Total cost $1.503 per acre 



If a large acreage is harvested annually, the cost per acre 

 will be much reduced. In modern siloing operations the 

 corn is loaded directly upon wagons, and the cost of shock- 

 ing, which is about one-third of the cost as given above, is 

 not incurred. 



Types of Corn Binders. There are two general types 

 of corn binders upon the market: those which bind the corn 

 in an upright position, and those which convey the cut corn 

 to a horizontal deck before binding. There is also an inter- 

 mediate type in which the corn is neither vertical nor hori- 

 zontal, but somewhere between the two, or inclined. Each 

 of these types is well 

 tried out and is success- 

 ful, and they differ but 

 little in the essentials of 

 construction. Dividers 

 on either side of the row 



gather and lift the down Fig. 158. A corn harvester of the 



stalks. Chains with lugs 



extending across the opening between the dividers carry 

 the stalks back to the binder proper. There are usually 

 three pairs of these conveyor chains, one pair for the butts, 

 one pair of main chains, and one pair for tall corn. 



At least one machine does not have the usual packer 

 found on the others and on the grain binder. In this machine 



