Report of the Trials of Ploughs, Harroios, Sfc, at Hull. 597 
Fig. 102. — Plan of Messrs. Coleman and Morton's CuUivaioi; No. 3093. 
The depth is regulated by altering the stop in front of the lever handle, and 
so keeping the tines in a more upright or forward position. When required 
to clear the ground at the land's-end, or when travelling, the lever handle is 
jiuUed down sufficientl}' to allow the stop being inserted in the hole shown in 
the elevation (Fig. 101). 
There is great simplicity and strength combined in these machines, nothing 
more than tlie bending of a tine from contact with a root or fast stone need 
be apprehended. It will be seen by reference to the tables that the draught was 
greater than with Clay's cultivator, and it was this which in great measure 
decided the relative position of these machines. 
Murray and Co. showed a complete novelty in their cul,tivator (No. 3510) 
for light land, which, though not in the prize list, was thought deserving of a 
careful trial, and made good work. We trust to be able to make our readers 
understand the peculiar construction of this implement by means of two illus- 
trations showing a side elevation and plan (Figs. 103 and 104). The centre 
frame is formed of a round ring of iiat iron on its edge, having an angle-iron 
bar 22 inches square extending right across the same, framed and braced 
together, to which the tines or radial breast arms are attached ; this, which 
may be distinguished as the lower frame, is held together quite independently 
of the upper frame, consisting of the beam, crank axle, wheels, lever, handle, 
and stop, all which parts are framed together , but separate from the lower 
frame ; the two are attached together by a large stud or boss in the centre, 
upon which the under frame turns when required, like the fore-carriage of a 
four-wheeled machine, the object of this freedom being that the radial arms 
can be made to follow each other in a narrow track, viz., only covering 3 feet 
2 inches, or the frame can be set to take nearly 5 feet, according to the angle 
in reference to the line of draught ; this is a highly ingenious arrangement. 
The two frames are made rigid in work by a bolt, shown at a in Fig. 103, 
■which goes through the beam and the rings of the lower frame. The depth 
is regulated by a movable stop shown at b in Fig. 104. The form of tines 
and breasts used, both for this implement and for a heavy-land cultivator, 
are peculiar. They are formed of steel plates like the mouldboard of a plough, 
and terminate in a diamond point. Fig. 105 shows a plan of the share. The 
plates are also twisted like a plough-board, but the angle is more acute. The 
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