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Report on the Exhibition and Trials 
opens, engages both strings, nips them tight (see Figs. 3 and 4), 
and at this moment the knife-arm pushes the loop over the 
portion held by the beak, thus making the knot. 
(4.) The knife is fixed to the lower side of the knife-arm, 
which is pivoted to the knotter frame, and actuated by an inner 
cam on the cam-wheel on shaft No. 5. It does not actually cut 
against anything, but it works within a quarter of an inch of a 
fixed guide which offers the necessary resistance. 
Fiff. 3. 
Fig. 4. 
(5.) The sheaf is discharged by the action of the light arms, 
which are seen in the first illustration. These arms are keyed 
on the knotter shaft, about a foot apart, on either side of the cam- 
wheel and gear. Their action is simply to push off the sheaf as 
the shaft revolves, the hinged platform and compressor arm 
dropping at the same moment. 
A small butter, hinged from the top of the frame, with 
revolving apron, can be set at different angles, according to the 
length of the crop, these changes being made by the driver 
whilst the machine is in motion, by a lever-rod. The action 
