Trials of Traction-Engines at Wolverhampton. 569 
The Ilansomcs, Sims, and Head 8-horso-powcr engine " Sutlieiland," with 
Thomson's indiarubbor tyres and jKit boiler, left the Show-j'ard at ^^h. 20ui. 
A.M., drawing 12 tons behind it, made up of a waggon witli its load, a 
threshiug-machiue, and a portable engine. Its own weight, with 300 gallons 
of water in the tank, and with 16 cwts. of coal, was about lOi tons. 
This engine arrived at Stafford at 9h. 48m., making the time occupied in 
J;he journey, including all stopijages, 4 hours 28 minutes. 
During the journey there was a stopjjage of 18 minutes, to take in from the 
■ canal 280 gallons of water ; 5 minutes for the men to get breakfast ; 2 minutes 
to allow a horse to pass ; and 4 minutes to tighten the cylinder cover ; making 
in all 29 minutes, so that the total time under weigh was 4 hours. The speed, 
therefore, was 4 miles per hour. The coals consumed were 6 cwt. 1 qr. 20 lbs. ; 
the water 395 gallons, giving 5"48 pounds of water evaporated for a pound of 
coal, showing that there must have been very little priming during the journey. 
T'lie ashes were dropped twice from the ash-pan during the run. They could 
not therefore be weighed back to go in reductioa of the quantity of coals. 
The average pressure of steam throughout the run was 121 lbs. The per- 
formances of the engine, as regards manageability, were everything that could 
be desired. Taking the useful load drawn of 12 tons, and the distance run 16 
miles, the consumption of coal was 3'75 lbs. per ton per mile, and of water 2'05 
gallons per ton per mile. 
Aveling's 10-horse-power engine, No. 7001, left the Show-yard at 5h. 25m. 
A.M. Its weight, with 12 cwts. of coal and the tank full, containing 217 
gallons, was about 12i tons. It drew behind it 15 tons, composed of a waggon 
and load, of a portable engine, and of a threshing-machine. It arrived at 
Stafford at lOh. 58m., making the time of the journey 5 hours 33 minutes. On 
one occasion the engine had to be uncoupled from the load, and a chain to be 
used to pull the load over a soft place in the road. The delays were, that the 
feed-pump was stopped for a short time (supposed by a piece of waste), and 
that water was taken in at two places. 
The quantity of water used was 466 gallons, equal to 6"81 lbs. of water per 
lb. of coal. The coal used was 6 cwts. 12 lbs., but there were 79 lbs. of 
ashes and unconsumed fire. As this, however, could not be ascertained in the 
«ase of all the engines, the Judges, for the purposes of comparison, record the 
difference between the coals taken in the bunkers and the coals weighed back. 
The speed appears to have been 3^ miles per hour when under way. The coals 
per ton per mile of useful load drawn was 2'85 lbs. The water consumed per 
ton per mile of useful load drawn was 1'94 gallons. 
Avelingand Porter's 6-horse-power, No. 7002, left the Show-yard at 5h. 29m. 
A.M. The weight of the engine, with tank full, containing 105 gallons, and with 
10 cwts. of coal, was about Sj tons. The load drawn was 9 tons, consisting of 
.a waggon with its load, and one portable engine. The time occupied in reach- 
ing Stafibrd was 5 hours 13 minutes, including stoppages. The coals used 
were 4 cwts., without allowing for the ashes weighed back, amounting to 
1 qr. 19 lbs. 
Burrell's 8-horse-power locomotive engine, No. 3660, left the yard at 
7h. 31m. The weight of the engine, with tank full, containing 150 gallons, and 
with 11 cwts. of coal was 9 tons. It drew behind it a load of 12 tons, namely 
.a waggon, a portable engine, and an ordinary waggon or lorry. It arr^^•ed at 
Stafibrd in 6 hours 26 minutes. The stoppages were three times, to take in 
water. The coals consumed were 5 cwts. 4 lbs. The ashes were not recorded. 
Taking the useful load drawn, the consumption was 2'99 lbs. of coal per ton 
per mile. , p 
Burrell's 8-horse-power pot boiler, with iudiarubber tyres. No. 3661, left the 
Show-yard at Wolverhampton at 5h. 46m. a.m. The weight of the engine, with 
.full tank of 250 gallons, and 11 cwts. of coals, was about 8 tons 17 cwts. The 
VOL. VII. — S, S. 2 P 
