Report on the Trials of Implements at Oxford. 
487 
efficient action of the rollers and the form of the knives, a large quantity of 
chaff was cut. A light sheet-iron shield is fixed to the frame between the 
11 wheel and pulley, to keep the clvalT from collecting round the inner periphery 
of the latter. 
Fig. 10. — Messrs. Carson and Toone's Chaffnittinfj Engine on wheels, 
with Chaff Elevator. 
The chaff was excellentlj'- cut, not f, but about i inch. It was clear that 
the first set of grooved rollers levelled the straw, and prepared it to be carried 
to the mouth by the second set, and thus materially assisted the attendants. 
In order to secure strength, the wheels are of malleable iron, the sjiindles are 
large, bearings of brass, and frame of wood, which Messrs. Carson and Toone 
find more durable, the iron being liable to fracture. This machine can be 
mounted on wheels, and fitted with a bagging apparatus, consisting of a case 
enclosing the knife, with an elevator on one side, from which the chaff is 
delivered into bags. On the large and exposed sheep farms in Wiltshire, this 
addition is found very valuable, as chaff can be cut however rough the wind 
may be. 
Messrs. Conies and Co. are old hands, having been prizetakers in former years. 
The workmanshij), as shown in their power machine, No. 2782, appears less 
perfect than in some ; the gearing was noisy. The gearing by clutch on 
the shaft, for throwing in and out of work, is fixed on the frame in front of the 
knives, and totally uncovered, and exposed to all the dust, &c., besides being 
somewhat dangerous. At the bottom of the box is a 4-inch roller, made of 
wood, fluted with iron, which travels at the snm; speed as the feed-rollers. 
Eollers have 13 rows of teeth. 
The leverage for pressing dowTi the box is placed at the side. Two lengths 
of chaff, f and -| inch, are cut by a change of pinion, which is not so simple or 
so expeditious an arrangement as some others. The mouth of the box is 13J 
inches by 3i inches. Price 13?. 
Thomas Allcoch, of Eadcliffe-on-Trent, was commended for his serviceable 
power machine, 8690, which lacked the finish of some of the larger makers ; and 
the axle of tlie fly-wheel not being true made it wobble. Two sizes of chaff are 
