108 
Report on Implements at Liverpool^ and on 
rocking-shaft consists of a steel rod carrying at its forward end a crank arm, 0', 
working in a slot in a vibrating compressor, K, pivoted at r, so as to give the 
compressor a movement eccentric to that of its driving-shaft. This shaft, 
owing to this construction, allows the compressing arm and its crank to yield 
under the strain of binding the sheaf. The binding-arm S is slotted length- 
wise to receive the supplementary arm T, pivoted at and is vibrated at proper 
intervals. Two wires are used in binding, and consequently two twists are 
formed. The wire from the upper reel W passes through a tubular spindle, x, 
with a tension spring, thence over a pulley, m, on the arm M^, thence over the 
Fig. 2. — Hear Elevation of McCormicTcs Grain-hinder. 
pulley s, where it is united to the lower wire. The lower wire passes from 
the spool V, a positive feed being employed. This arrangement is very clever. 
The wire is only fed when a bundle is bound. We will suppose that the two 
wires are connected, then the binding-carriage is ready to move forward with 
its binding-arm uplifted as is seen in the figure, in readiness to ^circle a 
bundle lying upon the platform. In the absence of any grain to be bound, 
the binding mechanism would go through its motions and return to its starting- 
13oint, but no wire would be fed from the lower spool. 
Although heavy, the machine is under perfect management and 
control, and the change from a heavy to a light cut can be effected 
instantly. Wood's machine, though of the same price as McCor- 
mick's, is much the lighter of the two. The tying apparatus is 
most ingenious, and to the way in which it twists and cut§ the 
wire no justice can be done by description. The delivery of the 
tied sheaf is a specialty that I shall have to notice when describing 
the trials. This machine is said to have cut 8000 acres of wheat 
this season. The following figures and descriptions are given 
by Mr. Coleman : — 
