564 Report of the Trials of Ploughs, Harroios, Sfc, at Hall. 
In Fia;. 46 the position of the plough is shown as it wonld he when tlie 
snbsoil-tine was operating to a depth of about 6 or 7 inches below the sole of 
the preceding furrow. The position of the land-wheel nearer the centre of the 
plough is also shown in this figure. 
Fig. 46 a. — Arrangement for securing Migklity. 
•> 
h 
J 
Fig. 46a represents the two beams, and the brace a and cross-bar h, which 
ensures rigidity. 
In order to convert the double-fuiTOW plough into a subsoiler, the front body 
must, of course, be removed, and a wrought-iron bracket applied to the beam 
by bolts and nuts. I'he bracket is drilled and a strong bolt used, which also 
passes through holes in the tine, and thus the depth of work is regulated. The 
bracket is fitted with a set-pin, which can be so adjusted as to support the 
tine when working at any depth, and thus remove all strain from the connecting- 
rod and lever. We believe this is the only double-furrow plough fitted with 
a subsoil-tine in which the lever actuates both the land-wheel and the tine. 
In reality it is very much the same motion as, or rather the result is similar 
to, that produced by the action of one lever on the land-wheel and the skid 
in some cases, and the wheel on the furrow side in others, 
W. Ball and Son. No. 1470.— Price, complete, 121. 10s. ; that is to say, 
21. 10s. extra for subsoiling parts. The application consists in removing 
the front body, and substi- 
Pig. 47, — Suhsoiler and Frame for applica- tuting a short frame (Fig. 
tion to W. Ball and Son's BouUe-furrow 47), which has a vertical 
Plough, No. 1470 
slot a, in which the screw- 
pin h, for regulating the depth 
of the tine, works. When in 
work the tine rests against a 
backstay in the frame. This 
was not made sufSciently 
strong, and gave way. The 
subsoil-tine can work between 
4 and G inches in depth before 
the furrow. Tlic tine is taken 
out of work by a leverage 
from the stilts. 
The tine is slightly bent in 
order to enter the soil as near 
the centre of the horse-track 
as possible. 
Murray and Co. No. 3505. 
— This firm showed two im- 
plements, in one of which the subsoiler consists of a double tine. The tine- 
carria<Te is very strong, being braced with three ribs, and a shoe underneath 
carries the tine during turning, shown in Fig. 48. aaa represent the ribs, 
and h is the shoe. The shoe with or without wings is cast, ihc exhibitors 
were, we believe, the first to apply a subsoiler to a double-furrow plough ; 
