Trials of Traction- Engines at IVokerhawpton. 
565 
Steam was got up to the full workint:; pressure of 122 lbs., and then the fire 
was raked out of the grate; U cwt, of coals was issued to the engine, and 
(1 lbs. of wood; the fire was re-lit, and in 5i minutes the steam was up to 
120 lbs. The engine was started at 2h. 27m. 30s. ; the load behind the engine 
was one waggon, weighing, including its own weight and tliat of the pig-iron 
with which it was freighted, 5^ tons. The engine was fired and steered by 
one boy. 
Paddles were bolted on to the wheels. During the run the speed varied 
from 100 revolutions np-hill to 210 on more favourable jiarts of the road. 
At 2h. 43m. the farm road was reached (at G3 chains on the sketch). There 
was a stoppage here of three minutes to take off the paddles. The engine 
then ran without- any paddles to the gate on the high road (at 97 chains). 
Here there was a difficulty in getting the waggon out of the field, and the 
engine had to run ahead along the road, and to use a length of chain between 
it and the waggon. At 2h. 59m. the so-called shunt was reached. A stoppage 
again took place to put on the paddles and to attach a chain. At 3h. 3m. the 
engine was started, and got down into the hollow named by the exhibitors 
"Easton's Hollow" (at chain 112); there a longer chain was put on.' The 
engine re-started at 3h.7m., pulling its truck out of the hollow, and going on to 
the 107th chain, where the entrance to the last field is. This was a bad bit : 
a short stoppage took place there, but it was very short, as the engine re-started 
at 3h. 9m. The eni^ine then went till 3h. 12m., when it entered a bad piece 
of ground in the last field ; there again the chain was put on, and at 3h. 17m. 
the end of the course was reached, making a total of filty-one minutes thirty 
seconds. On the arrival of the engine the coal remaining in the fire-box 
was carefully extracted, along with the ashes in the ash-pan, and was put into 
a closed iron box provided for the purjwse. The coals consumed were 153 lbs., 
minus the weight of coals and ashes weighed back, together 26 lbs., leaving, 
if these be treated as of half the value of coals, 140 lbs. The water con- 
sumed was 114 gallons, being at the rate of 8"14 lbs. of water consumed per 
pound of coal. No doubt part of this apparent excess of evaporative duty 
over and above that which was obtained during the trial on the brake was 
due to priming. 
Hansomes, Sima, and HeaiVs Q- Horse-power. — The next engine which started 
was Ransomes, Sims, and Head's Pot Boiler, with indiarubber tyres. No. 2149, 
8-horse-powcr. The engine at starting weighed about 10 tons Gi cwts. ; this 
included cwts. of coals and 255 gallons of water out of the 375 the tank 
holds when full ; of this w"eight about 7 tons 9 cwts. was upon the driving- 
wheels, and 2 tons 17^ cwts. upon the steering-wheel. The fire was raked out 
as in the case of the other engine, and was re-lit from the '2^ cwts. of coals above 
mentioned and 8 lbs. of wood. At eight minutes after the rc-lighting the 
engine was started in slow gear, with steam at 137 lbs. ; planks had been pre- 
viously placed under the wheels. At about 100 yards another plank was jnit 
itnder. By this time the spaces between the steel shoes round about the 
indiarubber were filled up with dirt, and the wheels ran round on the plank 
and could not start the load. At 3h. 13ra. the engine was uncoupled from the 
load — a chain was used, but the snatch of the engine broke it. At this time 
the wheel frame was revolving slowly within side the indiarubber tyre. At 
3h. 19m. a start was effected from the 18th chain, being the entrance of the 
second field. At 3h. 22m., while going down hill at the 19th chain, and upon 
a gradient of 1 in 44, the engine came into a soapy place and stopped ; an effort 
was made to back the engine, but nnsuccessfully, as the indiarubber tyres 
shpped round inside the steel shoes ; the ground was then dug out behind the 
wheels, planks were introduced, and at 3h. 35m. the engine was backed. At 
3h. 38m. it was re-started and put in fast gear. The reason given by Mr. Head, 
who was steering, was that in slow gear, owing to the engine's running so 
much more quickly, the boiler was liable to priming. There was then a good 
