Sutherland Reclamation. 
419 
Fig. 3) are for the land-side, two, G G, press on the top of the 
furrow, while the two, H H, in the centre, in connection with the 
revolving coulters, form the steerage. The revolving coulters, 1 1, 
are seen in Fig. 2, projecting bejond the middle rollers, which 
they bisect. They are flat iron discs, about 3 feet in diameter, 
rotating upon the same axes as these rollers, but can be made more 
or less eccentric with regard to them, so that they may be set to 
penetrate from 4 to 15 inches deep. The two landside rollers 
give balance to the implement, and assist in carrying it through 
gullies or other inequalities of the surface. The two furrow- 
Fig. 3. — Plan of Sutherland Plough. 
i F ii i i F il i 
wheels assist in completing the turning of the furrow after it 
leaves the mould-board, and press it into its position ; they also 
assist in balancing and guiding the implement. At each end 
of the frame, which is a strongly trussed structure of malleable 
iron, the lateral pieces are united together by a transverse iron bar, 
K, which passes through, and serves as a pivot for the end of the 
shaft, L, of the trailing subsoil plough, M. This second plough 
is kept down to its work by the tension of the tail rope, N,' acting 
on the loop line of wire-rope, o, which passes over the plough 
and connects the tail and the pulling ropes. It will be seen that 
the pull for drawing the implement is taken through the plough 
beam ; and when it is required to be reversed, the engine pulls 
the one plough out of work, while it presses the other by means 
of the looped line into its place for working. The effect of 
having the plough hung on the centre, K, and kept in its work 
by means of the pressure of the tail rope, is to give an elasticity 
to the working of the implement, and to allow it to override 
obstructions that cannot be pulled out. 
Engines of 14 and of IG-horse-power have been employed for 
