12 On the Draught nf P/oifijhs. 



since discovered. I have, however, to include a double plough of 

 Messrs. Barrett's that was on its way to Liverpool, and may be 

 described as a double D P. 



The whole were tried on a lio^ht j^ravelly loam, moist from 

 recent showers, from which a crop of Trifolium incarnatum had 

 been mowed. One horse only, for reasons which I will explam 

 when I come to the question of single-horse ploughing, was 

 attached to each, except the double plough ; and the following 

 statement is the result, in a furrow 8, in. wide by 5 in. deep : — 



Drawn by One Horse. 



Stones. 



1. Old Oxfordshire, one wheel . . « . . 20 



2. New ditto, Watlington . . i • • .18 



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



132 with ground-wrest . . . • . 17J 



4. Barrett's No. 8 one-wheel, with Brightwell mould-board 



and ground-wrest . . . . ■. .16 



5. Barrett's L 2, one-wheel ..... 14 



6. Barrett's new plough D P, one wheel . . .11 



Drawn by a Pair, 



7. DP 12 



8. Barrett's new double plough . . . . .24 



Thus it will be seen that by my original transition from the 

 wooden plough at 20 stones to the L 2 at 14, I gained 6 stones, 

 equal nearly to 1 horse in 3 ; and thus showing that my two-horse 

 teams had been working no harder than my three horses had 

 originally. Next to this conviction, this experiment proved to me 

 that I had made a valuable discovery — a still lighter plough — 

 lighter than L 2, I had been so long using. I first had the satis- 

 faction of confirming that I had for some years been undoubtedly 

 saving 30 per cent, in ploughing, and now discover that I may 

 again make a considerable saving by abandoning the L 2, and 

 henceforth adopting the D P ; and of course 1 determined on so 

 doing, should I on trial find the latter equal in other qualities to 

 the former. I have so tried it, and have found it in general work a 

 superior plough ; and I am only waiting some further improvements 

 Messrs. Barrett have undertaken in it, to restock myself entirely 

 with it. But I do not hesitate to say that, if I should have the 

 good fortune to meet with a lighter in draught (sufficiently light 

 to amount to a saving, and with qualities equal), this also must 

 share the fate of its two predecessors. 



It may be worth while to consider what number of stones 

 gained in draught would justify us in abandoning an old plough. 

 If the power of one horse be put at 10 stones, one stone saved in 

 pair-horse ploughing will be 5 per cent, on each horse. And 

 this 5 per cent. I should consider myself at liberty to set down 



