558 Report of the Trials of Ploughs, Harroivs, Sfc, at Hull. 
Corhett and Peele. No. 2846. — This implement comprises an ordinary heavy- 
land plough, to which is attached a beam to carry the subsoil-tine, which, as 
in Mellard's, precedes the plough. Tlie whole of the draught is taken from the 
plough-beam, which is evidently a bad arrangement, and probably accounts 
for the unsteadiness, tendency to kick, and difticulty in steering, which were 
very great. The principle of subsoiling before the plough is correct, inasmuch 
as we thus avoid treading on the work ; but in all the machines so arranged, at 
any rate as regards one-furrow ploughs, the balance is so injuriously affected 
that an even good furrow is out of the question. This implement is well made, 
and looked much more like business than some others. The leverage for 
taking the tine out of work is shown in Fig. 41. The subsoiling-tine, which 
Fig. 40. — Plan of Messrs. Corhett and PeeWs Plough loith Suhsoiler 
attached, No. 2846. 
Fig. 41. — Subsoil-tine attached to Messrs. Corhett and Peele's Plough, 
No. 2846. 
is 3 inches deep by f inch thick, is fitted with adjustable points, varying 
from 2^ to 6 inches. The soil was well moved to a depth of about 5 inches 
below the furrow. The defects appear to arise from improper draught-attach- 
ment and from the tine not being set wide enough from the plough-beam. 
This will be seen by reference to Fig. 40, The points, instead of travelling 
in the centre of the horseway, are much too near the hard ground, and the 
draught is greater than it need be in consequence. The subsoil-attachment 
costs 21. 10s. extra ; tiie plough alone 5Z. 5s. 
George Murray and Co. No. 3504. — Here, as in Ball's plough, the subsoil- 
frame is attached behind the mouldboard of a strong swing-jilough. The beam 
