80 
Report of the Judges on the 
valves till they terminate in points. The Exhibitors attribute to this form a 
more easy entrance for the water. The bearing-wheels are of wood. The 
axles for the hind-wheels are supported in cast-iron brackets, bolted to the fire- 
box. 
On trial the engine ran for 1 h. 48 m. of actual time, and 1 h. 525 ™- of 
mechanical time, the coal used being 7 '47 lb. per brake horse-power per 
hour. The indicator diagram shows a development of 12 "15 horse-power. 
Fig. 10. — Indicator-diagram of Messrs. Aslihy, Jeffery, and Luke's 
Portable Steam-Engine, No. 4004 (No. 1 diagram, 48 lbs. spring). 
equivalent to a consumption of 4"92 lbs. of coal for each such horse-power. 
The great disparity between the brake and the indicated horse-powers, viz., as 
2 to 3, it is believed arose in a large measure from sand of the cores having 
been left in the steam passages, and then being driven from them into the 
cylinder. 
The temperature of the feed water was not taken. The quantity evaporated 
was equal to about 1146 lbs. at 212°, being at the rate of 9 '27 lbs. per pound 
of coal. 
For the purposes of easy comparison, tlie leading dimensions 
of the different engines, and also the results of the trials, are 
exhibited in the following Tables I. and II., prepared by Messrs. 
Eastons and Anderson, the Consulting Engineers of the Society. 
The Judges look upon the results which these Tables show as 
highly satisfactory in many cases, and as reflecting in those 
cases the greatest possible credit on the engineers, to whom such 
results are due. 
The professional duties of the Judges have caused them to 
be intimately acquainted with the progress and attainments of 
the marine engine, of the locomotive, and of the fixed engine, 
used for manufacturing purposes, and with those of the engines 
employed for pumping water ; and they have no hesitation in 
saying, that agricultural engineers may fearlessly challenge for 
their work, comparison with any one of these other products of 
engineering science and skill. 
