on Agricultural Implements. 631 



If we add 7s. for wear and tear,* we find the wheat to b:' 

 threshed and winnowed for the almost incredibly low sum of Id. 

 only per quarter. Messrs. Clayton and Shuttleworth have there- 

 fore now taken the lead in the improvement of threshing- 

 machines. 



Clayton and Shuttleworth's Threshing and Dressing Machine. 



3. Winnowing-machine. 



Even winnowing is become a refined process ; for instead 

 of trusting the corn to the wind, it is now placed in a machine 

 so discriminating that the best of these, Messrs. Hornsby's, 



Ilornsby's Dressing Machine. 



* I am told that this would be a fair allowance for wear and tear on a farm of 500 

 acres where the steam-engine is used for chatTcutting, grinding, &c., as well as 

 threshing. 



