FARM IMPLEMENTS. 



143 



This latter separates short straw, pieces of earth and all 

 matter larger than the grain. 



The grain then falls into 



Vic,. 41. TIIK SKKD (Ji;.\iu-.i;. 



the screen and is discharged into a number of boxes, placed 

 underneath the same, each box receiving a different grade 

 or quality of grain. 



Winnowing Machines. -Unlike the preceding, this ma- 

 chine is supplied with fans which createa blast of air. It 

 is us'ed for cleaning grain, and is turned by hand. The 

 grain is put into u hopper from which it falls on to 

 oscillating riddles, while the chaff is blown away from the 

 machine by the current of air created by the revolving fan. 

 The light grain falls into a box at the end of the machine, 

 while the heavy or best quality grain falls through the 

 riddles, and by passing down an inclined sieve the small 

 seeds of weeds, etc,, are separated, and the operation is 



