108 SCIENCE OF SUCCESSFUL THRESHING. 



with each team until they are accustomed to the noise and to 

 traveling in a circle. 



Setting a Horse-Power. A horse-power, to work prop- 

 erly, must be securely held in position. To do this, it is 

 necessary to use at least four stakes, each of which should 

 be about three feet long. The power should be set in align- 

 ment with the separator so that the tumbling-rods are as 

 straight as possible. As it is almost impossible to secure 

 the power so that it will not shift slightly when started, it 

 is best to make allowance for this when setting. The line 

 of rods cannot be straight horizontally, as one end must 

 attach to the spur-pinion shaft of the power and the other 

 to the bevel-gear shaft of the separator, while the second 

 rod from the power must lie near the ground in order to 

 allow the horses to walk over it. The angles in the line of 

 rods necessary to meet these conditions are taken care of by 

 the knuckles connecting them, but the angles should be care- 

 fully divided so that they are as slight as possible at each 

 knuckle. When run at great angles, knuckles consume con- 

 siderable power and cause excessive and unnecessary work 

 on the part of the horses. 



Lubrication of the Horse-Pozver. There are two bull- 

 pinion boxes, (an upper and lower), and two center-boxes 

 at each end, making eight boxes in all, to be oiled on the 

 bull-pinion shafts. There are also two spur-pinion shaft 

 boxes and the journals of the traverse-rollers to be oiled. 

 All the gearing and the bottom and the top of the bull-wheel 



