On the Draught of Ploughs. 15 



11. A Warwickshire iron double plough, well constructed, but of 

 great weight. I have taken the liberty of putting down Barrett's 

 double plough, though not present ; and of stating it at double the draught 

 of D P, which I am confident, from the experience I have had with it, 

 would have been as nearly as possible tiie number of stones it would 

 have exhibited had it been tried on the present occasion. 



These single ploughs were all tried on the 3rd of March on a 

 wheat stubble, in a gravelly sandy loam, after a good deal of wet; 

 and the results following were noted down by those present. The 

 furrow was kept at 9 inches wide and 5 inches deep : — 



Stones. 



1. Cuddesden, Oxon, old one-wheel . . .22 



2. Burcott, do. do. . . . .22 



3. Scotch swing-plough . . . .20 



4. Barrett's No. 8 two- wheel, with Ransome mould-board 20 



5. Barrett's No. 8 one-wheel, with Biightwell mould-board 19 



6. Watlington, Oxon, one-wheel . . .18 



7. Hart's one-wheel . . . . .1*7 



8. Ransome's N L 7, two low wdieels . . .16 



9. Barrett's L 2, one-wheel . . . .15 

 10. Barrett's D P, one-wheel . . . * 13 



Double ploughs. 

 Warwickshire double plough, iron . . .38 



Barrett's double plough, wooden beams . . 26 



There is nothing particularly new in this experiment : it is 

 similar in many respects to the one I have detailed before, and it 

 resembles one or two of the trials you have* already recorded in 

 the Journal. Its value consists chiefly in confirming the results 

 previously arrived at, and going some way I trust in establishing 

 them. 



1. It is premised, as placed beyond a doubt, that the draught- 

 gauge, properly constructed, is an unerring test of the amount of 

 draught required by an implement, and of work performed by an 

 animal or other moving power, and as such is useful as a practi- 

 cal guide to every farmer. 



2. It is made clear that the vague principles of village plough- 

 making must give way to the better defined and more economical 

 system of more instructed practitioners. 



3. It is shown that the wheel has a decided advantage over the 

 swing plough, and that this must necessarily be the case, on plain 

 mechanical principles, I will show in another place. The supe- 

 rior science of the Scotch plough, displayed particularly in its 

 mould-board, is from this defect obliged to yield to less perfect 

 implements. 



4. That a great majority of the improved wheel- ploughs have 

 hitherto been constructed so little with a view to lightness of 



* Trial iii. p. 228, vol. i. Part iii. Journal. 



