145 



ilie most useful and profitable instrument belonging to ft 

 farm, and that its advantages should be accountid INCAL- 

 CULABLE. 



Some estimates, however, have been made of the ad- 

 vantages to be derived from this invention, which one far- 

 mer calculates at the rate of 5 s. per acre *, whilst others 

 state it at 5 s. per acre, with horse mills, but at full 10 s. 

 per acre upon the whole lands under crop, when the ma- 

 chine is driven by water, .by wind, or by oxenf. Mr 

 Dudgeon of Primrose Hill$ from general observation, 

 without entering into minute calculations, is of opi- 

 nion, that the aggregate advantage derived from a 

 well constructed threshing mill, wrought by water, and 

 tinder proper management, (when compared with the old 

 mode of threshing,) will be about 8 per cent, upon the 

 corn threshed, including labour alone, but without ma- 

 king any allowance for money sunk in erecting the mill, 

 or repairing the machinery. It is calculated by an intel- 

 ligent farmer, that a threshing-mill, saves, on an ave- 

 rage, the expence of three men for nine months, which, 

 on a farm producing loco bolls, is equal to about L. 70,' 

 or is. 3d. per boll. Mr Dudgeon of Prora, has made 

 a comparative estimate of the expence of threshing wheat 

 by the mill and the flail, from which it appears that the 

 saving of charges in threshing alone, independent of other 

 advantages, though the work be performed by horses, and 

 not by any cheaper power, is equal to 47 s. per 50 bolls, 

 or ud. per boll. 



T 



.,.],... 



* Communication from Mr Charles Alexander of Easter 

 Haprew. 



f Communication from Mr Wood of Milrig. 



