Report on the Trials of Implements at Cardiff. 427 
The rotary-screen has a very neat method of adjustment. It is formed of 
longitudinal steel-bars, with a square section ; each wire is cranked at one end, 
and by a simple arrangement they can all be turned simultaneously, so as to 
t present either their angles or their fiat sides to each other, the space between 
them varying accordingly. 
The shaking of the straw was not done satisfactorily. 
0252. Barrows and Uttwart. — Two belts on the left side; one of them, from 
the drum-shaft, works in the .'^amc direction as the driving-belt from the 
enpiue. Four belts on the ri^ht side, two ol tl.em, from the drum-shatt, both 
pulling the shaft forward. 'J'he chaff is not bagged, but a bean-threshing appa- 
ratus is provided. 'J'hcre are two crank-shafts to the shakers. The pulley on 
tiic shaft driving the caviug-riddle is made heavy, to act as a .small fly-wheel; 
and the caving-riddle is grooved, with plain 1-inch holes in the grooves. 
Tlie machine shook much in working, and the drum-shaft bearing on the left 
I side became very hot. 
1 4883. E. Humphi ies. — Four belts on the left side, two of them from the drum- 
i shaft placed opposite to the driving-belt; a pair of bevelled wheels drive the 
. Eainforth screen. Three belts on the right; two of them, from tlie drum-sliaft, 
I both draw forward. In this and the three machines to be next described the com 
I is delivered on the left side, and not, as is now more usual in finisliing machines, 
I at the back. The cavings are delivered at the hack, and the chaff in front of 
I them under the macliine. A small pulley on the drum-shaft, by means of a 
short crossed belt, drives the lame pulley on the shaker crank-shalt. Its short- 
I ness causes the twist of the strap to come very close to the small pulley ; this 
is objectionable, as producing much friction and wearing of the strap. A 
separate wbiie-eoater and hummeller are provided. A Rainfoith screm was 
used. The straw was delivered straight and unbroken, but not well threshed, 
and much corn was left in the chaff. Both defects resulted from t( 0 low a speed. 
48^3. E. Humi/hries. — In all respects similar to the above, except that for 
the rotary-screen an oscillating shoe was substituted, having an upper riddle 
of perlbrated sheet-iron and a lower sieve of v;ire-net; this attempt to separate 
the com without the use of a rotary-screen did not receive a sati.-factorj- trial. 
The exhibitor had fixed on the drum-sliaft of each of his machines a ri'jger of 
8 inches diameter; this gave too slow a motion to all the parts of the machines, 
and accounts for their total failure in " finishing " the corn. The caving-riddle, 
patented by this maker, is well known, and is one of the most popular forms 
amouiT the great variety of riddles exhibited. It has a jilain surlacf, perforated 
with holes drilled obliquely to that surface. The object of this is that if short 
straw in descending over the .surface should be jerked head foremost into one 
of these holes, it should not fall through, but be caught and driven back by 
the slojdng side of the hole opjxised to it (bce Fig. 11). 
The price of Ko. 4883 is lower than that of any other machine in this class, 
and its performance was better than that of many of those costing more monej'. 
Fig. 11. — Section of part of E. Humphries' Caving-riddle. 
5097. Joaeph Gilbert. — Three belts on the left side, two of them from the 
drum-shaft opposite to the engine-belt ; a pair of bevel wheels drive the Penney- 
screen. Three belts on the right side, two of them from the drum-shaft, both 
drawing the shaft forwards. In this machine the drum diflers Irom those 
already described, in being to some extent closed by means of iron-wires 
(j^g inch diameter and 1 inch apart from centre to centre), which are wrapped 
round the drum-frame ; the eight steel Goucher-beaters are fastened on' woode n 
