592 



Beport to H.R.H. the President 



doubt that on most soils it is useful once in four years, when the 

 root crop recurs, to give the land a deep stirring : if that be 

 thought too laborious, the farm should, in each field, get once at 

 least, if only once for all, a thorough disturbance. But a common 

 plough is not suitable for this purpose, since the soil crumbles 

 back into the furrow. One such deep plough, therefore, as 

 Busby's should be kept on most farms, to be worked at leisure 

 in winter with four or even six horses. 



2. Harrow. 



The harrow has been made, I suppose, with square bars, and 

 therefore straight-set teeth, for as many centuries as it has been 

 used, but it is difficult to make the teeth of such a harrow work 

 always in different tracks, although the harrows are dragged from 

 the corner. This imperfection has been remedied within the last 

 few years, in two harrows, to each of which prizes have been 

 awarded. The teeth being set crossways, the harrows themselves 

 can now be drawn straight. 



Williams's Patent Iron Harrows. 



Howard's Harrows. 



A third novelty has also been produced and rewarded — Mr. 

 Coleman's expanding harrow. The bars at every point of 

 crossing are united not by a screw, but by a loose pin, on which 

 they work freely. Thus the width of the harrow can be 

 increased or diminished, and the tines, according to the state 



