Report of the Trials of Ploiif/hs, Harrows, Sj-c, at Hull. 5G5 
the work was very indiflcvcnt, and the .i])pavatus clumsy and roii^lily made, 
althoush stronp;. The thie-stoj) a])peared to be in the wrong place to take 
the strain of the tine when in work. The work was so indifferent that no 
observations as to depth were recorded. The price complete is 13?., including 
21. for the subsoiler and attachment. 
Fig. 48. Fig. 49. 
Murray. No. 350G. — The stronger implement was broken during the trial ; 
here a double tine attached to a powerful frame was fixed to the plough-beam, 
and lowered and raised by means of a ratchet wheel and screw lever frona 
stilts ; a small friction-wheel assisting in taking a bearing at the land's-end,. 
when the tines are raised. This is shown in Fig. 49, in which a represents 
the friction-wheel. This was a clumsy aiTangement. 
The price complete, both as a subsoiler and double-furrow plough, is 
16Z. 16s., a formidable figure. 
The Prize of hi. was awarded to Corbett and Peele, Persever- 
ance Ironworks, Shrewsbury, for No. 2847. 
Class 11. — One-way Ploughs. 
Mr. John Davey, of Croftliole, St. Germans, Cornwall, was the only 
Exhibitor in this and the next Class for Double-fuiTOW One-way Ploughs. One- 
way or turn wrest ploughs are not much used now save in hilly districts, where it 
is necessary that the furrows should all be turned in one direction. Mr. Davey's 
exhibits were therefore quite novelties at Hull ; their ingenuity, simplicity, 
and admirable construction merited all the notice they received. In order to 
lay the furrows in one direction it is necessary to have two separate mould- 
boards, one out of work and capable of replacing the other when the plough is- 
travelling in the opposite direction, because the furrows have to be throvra 
alternately to the right and left of the beam. Mr. Davey efiects this by 
carrying the two mouldboards on a common axle, the connecting arm being 
so proportioned that, whilst one is in position, the other is carried directly 
overhead and clear of the beam. The method of reversing is admirably simple, 
and consists of a lever from the stilts with a crank arm, which is turned over at 
its end, or rather at the point luider the beam, where it couples to a rod from 
the share, which runs above the sole or slade ; the crank arm comes in 
contact with the inner surface of the mouldboard, and pushes it over into the 
required position. The same action causing the share, which works on a 
pivot and has two similar faces, to turn over from one side to the other. This 
is highly ingenious, and noticeable for its extreme simplicity ; there is nothing 
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