Rejiort of the Trials of Ploughs, Harrows, ^'c, at Hull. 559 
of the subsoil-tiue is carried on an axle from the team of the plough. One or 
two tines can be worked, according to the soil. The socket of the hind one is 
fixed, but the front one shifts on a cross-bar, so as to work in the centre of the 
horse-track when only one tine is used. The depth is regulated in two ways : 
first by a stop on the end of the subsoil-beam, clipping the plough-beam, as 
seen in Figs. 42 and 43 ; and secondly, by lowering or raising the tines them- 
selves. 
Fig. 42. — Messrs. Murray and Co.'s Swing Plough loith attachment for 
Subsoiler, No. 3504. 
a. Mode of carrying the second tine when not 
in worlc. 
Fig. 43 is a bird's-eye view of the subsoil frame, a represents the movable 
socket of the front tine ; b is the hind tine ; c the axle carrying the subsoil 
beam ; d the subsoil beam, with clip to cast plough beam in front. The work 
was well done ; the total depth about 10 inches, of which the average was 5| 
inches ploughed and 4|- inches subsoiled. The action 
of the tine behind the plough appears to steady the 
implement. By adopting a peculiar arrangement 
of bridle it is quite possible to draw the i)Iough by 
horses in line and all walking on the unploughed 
ground, and in this way the objectionable horse- 
treading is avoided. The price of Murray's imple- 
ment, complete with the two tines, is 81. 10s. 
Fig. 43. 
This class was tried in Field No. 1 on 
comparatively light land, yet it was evi- 
dent from the exertions of the horses, and 
is proved by the tables appended, that the 
operation of disturbing the subsoil is work 
more suitable to steam than horse-power ; 
and after the trials at Hull we think the 
Society would be justified in withdrawing 
the prizes for subsoilers to follow an ordinary plough, represented 
by Class 8, and for combined single-furrow plough-subsoiler. 
The fact of implements being brought forward to compete for 
prizes is no proof of utility ; for they will come, if only made 
for the particular occasion and cast on one side ever afterwards. 
The Prize of 51. was awarded to William Ball and Son, of 
Rothwell, Northamptonshire. 
Particulars of the implements competing in Classes 8 and 9 
will be found tabulated on page 560. 
