24 



from the inside; in some, however, it is taken from the outside hub 

 of the main driver (see fig. 13, p. 20). . The arrangements for reducing 

 friction and exchiding dust from the bearings receive careful atten- 

 tion, as may be noted, from the numerous roller bearings and brass- 

 l)earing boxes. Gears are also protected wherever possible, to pre- 

 vent wear from dirt and grit. Where gears are not properly protected 

 and oiled there is apt to be a great loss of power, to say nothing of 

 the wear. When they receive careful attention, however, the power 

 required to move them is reduced considerably below that required 



for chain and sprocket. 

 The driving power is in- 

 creased hj means of lugs 

 cast or riveted on the rim 

 of the main drive (fig. 15). 

 They are made of various 

 shapes, the object of all be- 

 ing to sink into the earth 

 in such a way as to prevent 

 slipping. Tubing, angle 

 iron, and bar iron are used 

 almost exclusively in the 

 construction of the frames. 

 These give strength and 

 lightness, features which 

 are most essential to a per- 

 fect machine. The attend- 

 ant, from his seat on the 

 machine, has perfect con- 

 trol over all parts. The 

 levers at his side operate 

 all adjustments, and the 

 position of the bundle car- 

 rier is controlled by a foot- 

 lever attachment. 



These machines weigh, 

 complete, from 1,400 to 

 1,800 pounds. Generally 

 speaking, those weigliing in the neighborhood of 1,500 pounds have 

 been most successful, this weight seeming to give the proper relation 

 between driving power and durability. 



The corn binder is used to greatest advantage in fields where the 

 corn is check-rowed, as it is possible to cut around a block, keeping 

 the machine constantly in operation. 



When the corn is cut high with a corn binder the farmer experiences 

 considerable difficulty in getting rid of the corn stubble. In order 



Fig. 10.— Corn-stubble cutter, attached to com harvester. 



