510 Report on the Trials of Implements at Wolverhampton. 
of the rope-^voove in the periphery of tlie pulley D, moves with less velo- 
city, or, in otlier words, at the rate of a less number of feet per minute, than 
the rope L which gives motion to the pulley D. Both ropes, however, move- 
with j)recisely equal speed, namely, the pace of the impletnent to which they 
are respectively attached out in the field ; and hence the outgoing or slack rope 
K also moves with greater lineal speed than does the ring J. But this rope 
drives the jiuUey A, because pressed tightly into the groove by the roller Gr ; and 
the rimof the pulley A being further from the centre than the ]iitch-line occupied 
by the rope, moves with a velocity greater than that of the i-opc, and therefore 
greater tlian that of the ring or flange J which is pressed against it. The result 
is that the pulley D tends to retard the pulley A, which in turn endeavours to 
drive the pulley D ; and any power expended in holding back the slack rope 
K is recovered in driving the pulley D and consequently assisting to urge 
forward the hauling-rope L. When K becomes the puUing-rope and L the 
slack, the movement of the pulley D and arm or bar E toward the pulley B 
presses the roller H upon the rope L, thus holding it tightly in its groove ;. 
and the retarding of the rope L tends to help in pulling the rope K. 
The two single snatch-blocks at the ends of the furrow are shifted by hand 
in the ordinary' manner. The working force of five men and two boys, with 
eight horses to move the tackle, set down to work in 21 minutes. The 5-tine 
cultivator, with four tines having on 13-inch-wide blades, with the rocking 
prongs or stirrers, made good work in the clover-lea, at an average depth 
of 7t inches, leaving a very even bottom, but the surface not sufficiently 
rough. Allowing for a delay, but including time lost in an upsetting of the 
double snatch-block owing to its having been insufficiently fastened down by 
the stakes, the 3-acre plot was finished in 2 hours 14 minutes ; being at the 
rate of 13 acres, 1 rood, 29 perches in ten hours, or 16 acres and 28 perches in ais 
autumn day of twelve hours. The average time occupied in reversing the im- 
plement at the ends was 28 seconds. 
At Stafford, on July 5tb, on Plot 3, upon a two-years-old turf, the soil a 
strong claj- loam with fast bottom, and with a very deep hollow in the field, 
this set of tackle worked a plough at inches depth, making good work. lu 
cultivating at 5| inches depth, and digging at 6|- inches depth, very fair work 
also WHS performed. 
Flot G in Field No. XIV. Messrs. Barrows and Btexvarfs \2-TTorse Port- 
cible Engine, and Detached-Windlass Set, with 5-tine Woohton Cultivator, itc. 
(Catalogue No., 8G5) ; price i8ijl. The weight of the engine is 4 tons 11 cwts. 
i qr. 16 lbs. ; of the windlass, 3 tons 19 cwts. 21 lbs. With five men and 
two boys, and a force of eight horses, this tackle was set down in 28 j minutes. 
The clover-lea was cultivated at an average depth of 9 inches ; but the work 
was inferior, not well broken up, and the bottom very irregular, owing to the 
tines working from 3 to 5 inches deeper than the spaces between them. The 
average time occupied in turning the implement at the ends was 33 seconds ; 
and the 3-acre plot was finished in 2 hours, 19 minutes ; being at the rate of 
12 acres, 3 roods, 31 perches, in 10 hours ; or 15 acres, 2 roods, 5 perches, iu' 
an autumn day of 12 hours. 
The work done at Stafford for Class 11. by the apparatus of Messrs. 
Barruws and Stewart, the Eavcnsthorpe Engineering Company, and Messrs. J. 
Fowler and Co., was the same as for Class I. It may be observed here that 
the limitation as to weight— namely, " the weight of the steam-engine not to 
exceed 10 tons" as interpreted in the "condition," that "the weight of the 
engine shall be deemed to be exclusive of coal, water, and rope, but to include 
the weight of the drum or windlass" — evidently has reference to the engine 
with its self-contained machinery tipon the same travelling wheels, and in no 
way embraces the weight of any detached parts of the apparatus, whether they 
be windlasses or otherwise. The palpable intention of the condition is to 
