Report of the Trials of Ploughs, Harroivs, ^t., at Hull. 557 
here again the Judges were driven to the conclusion that subsoiling, at any rate 
in connection with (i single-furrow horse-plough, was altogether a mistake. 
Fig. 37.— Ball and Son's 
Dotihle-tine. 
Fig 38. — Ball and Soiii 
Single-tine. 
Mellard and Co. No. 4321. — One of the ordinary disc ploughs, with sub- 
soiling-apparatus attached to the beam in front. A turned axle carries the 
subsoiling-tine. This arm has four grooves at its extremity, one inch apart : a 
set screw fits in these grooves and holds the tine to its required position, which 
is capable of alteration within the limits of these grooves. A lever-arm for 
raising or lowering the subsoiler terminates at the stilts, and is readily actuated 
Fig. 39. — Messrs. Mellard and Co.'s Disc Plough, loith Subsoiler attached. 
No. 4321. 
a. Attachment of tine on turned axle. c. Beam. 
b. Subsoil-tine with draft-chain, and an iron rod to strengthen it. d. Lever-handle for stilts. ^ 
by the ploughman. The draught is taken partly from the beam (c) above^the 
mould-board and partly from the front of the subsoiling-tine (i), the two 
draught-rods imiting in a common ring in front. This is a good arrangement. 
The axle is stayed by a |^-inch round rod at the back, connecting it with the 
beam. This implement, which is meritorious both in its workmanship and 
construction, imfortunately did not come into competition, as a preliminary trial 
proved the weakness of the beam, which sprung considerably between the point 
of attachment of the arm and the body- of the plough. Fig. 39, giving a side 
view, will assist the reader to form some idea of the implement. The axle 
comes out 18 inches from the beam. The price complete is 6/. 15s. 
