1 324 



ENCYCLOPAEDIA OF AGRICULTURE. 



SUPPLEMENT. 



u orking Into the wheela If. and v of 40 cogs (sixteen inches diameter), on the lower feeding roller spindle ; 

 these t»<> wheels arc not fixed on the tplndle. but revolve freely on turned parts of the shaft, and give 

 motion to it uy meant "f the clutch and handle, w. when the machine is at work the clutch is in the 



wheel r. giving to the feeding rollen the required motion; should it he nece»sary to stop the rollers, 

 the handle u> la moved from the feeding board, and the clutch disengaged from the wheel v. should 

 the handle he moved farther from the feeding hoard, the clutch is thrown into the wheel u, and the 

 rollers turn the reverse way. 



R20r,. The wmnotring machine under the shakers is driven by a sheave on the drum axis, and a ropo 

 leading to a sheave on the fanner spindle ; to dress the grain thoroughly, it is conveyed from this 

 machine, and passes through two winnowing machines, one placed above the other: this is effected by 

 means of a canvass cloth, on which are strips of wood half an inch in thickness ; the cloth revolves on 

 two rollers, and is set in motion by a rope leading from a sheave on the shaft i to a sheave on the upper 

 roller spindle. 



As it is ahsolutely necessary to have a steady and uniform motion to produce the best possible sample 

 from a winnowing machine, and as the velocity of the threshing machine is subject to vary, from irregular 

 feeding and other causes, the winnowing or dressing machines are set in motion by a small water-wheel, 

 *, five feet diameter, on the axis of which is a bevel wheel, twenty inches in diameter, working into a 

 pinion on an inclined shaft, y. On the upper end of the shaft y is a bevel wheel working into a pinion, 

 on the axis of which is another bevel wheel giving motion to the shaft z, which turns the fanners by 

 means of small mitre wheels. 



N'207. The bmie-mill ami cliaff-cntting machine are driven by the mitre wheels /and k. On the shaft 

 2 is a shifting pinion, 3, of sixteen cogs (ten inches diameter), working into the wheel 4, of 49 cogs (two 

 feet four inches diameter), on the axis of which is a pinion, h, of lfi cogs (ten inches diameter), driving 

 the wheel G, of 49 cogs (two feet four inches diameter), in the axis of one of the lower crushers: the 



