Trials of Portable Steam-Engines at Cardiff. 
57 
as possible at the speed ilcclared at entry will be considered a point of merit. 
The engines must be fitted with governors, and the efficiency of" the latter 
will be tested, after the trials for economy of working are over, by suddenlj' 
varying the load on the brake." 
Following up the suggestion contained in last year's Report, 
the Judges endeavoured to get the heat of the escaping gases 
in the smoke-boxes. Unhappily the arrangements were not 
sufficiently near to perfection, to enable observations that 
could be relied on to be obtained in all cases ; those which 
are worthy to be recorded are given in the Table II. It is 
much to be regretted that the whole set are not complete ; 
but enough was done to show that, except in one or two instances, 
the heat was very effectually abstracted from the products of 
combustion, and that they carried very little waste with them 
up the chimney. There was a most marked improvement on 
this point, as compared with the condition of things at Wolver- 
hampton ; where in every case that was tried, rough though the 
trial was, the temperature was high, while in some instances it 
was so great as to melt lead freely. The result of the Exhibitors* 
attention to this matter has been most gratifying ; for, whereas at 
the Wolverhampton meeting the average evaporation from cold 
water was only f3'9 lbs. of water per lb. of coal consumed, equal to 
8 lbs. of water evaporated from 212°, the quantity boiled off at 
Cardiff averaged 9'851bs. from 212°; and while this is the com- 
parison of the average, the comparison between the best per- 
formance at Cardiff, and the best at Wolverhampton, is equally 
satisfactory. At Cardiff, as much as 11*83 lbs. from 212° was 
evaporated as a maximum, while at Wolverhampton only 7"7G 
lbs. were boiled off from cold water, equal to 9 lbs. from 212° 
as a maximum. 
The Prizes offered were as follows : — 
For the best Portable Steam-Engine (not self-moving), 
not exceeding 8-horse-power 40/. 
For the second ditto ditto 20/. 
The following is the list of engines that were originally entered 
for trial. This list shows also the order in which they were to 
be tried, that order being determined, as usual, by lot. 
5024 Marshall, Sons, and Co., Limited. 
*4975 Wallis and Steevens. 
4942 Clayton and Shuttleworth. 
4834 Hayes, Edward, 
4959 Davey, Paxman, and Co. 
*4896 Tuxford and Sons. 
*5043 Lewin, Stephen. 
