68 
Report of the J uJges on the 
with great steadiness, and in the subsequent trial, to test the efiScacy of the 
governor regulation, beliaved extremely well, the sliding-cani and the gridiron 
expansion-valve all acting properly, and keeping the engine under perfect 
control. 
The consumption of coal, per indicated horse-power, was 2'85 lbs. per horse- 
power per hour, that horse-power being 13'C6. 
This engine was " Highly Commended" by the Judges. 
The next engine which was tried w.is (No. 4894) by Messrs, 
Brown and May, of Devizes. Price 230/. 
The diameter of cylinder of this engine is 7^- inches, the length of stroke 
1 foot. Total heating surface 159'1 square feet. The fire-grate area 3'2 square- 
I'eet. 
Q'he trial was made with the full area of this grate, no bricks being used. 
Fig. 4. — Indicator-diagram of Messrs. Brown and May's Portable Sicum- 
Engine, No. 4894 (No. 6 diagi-am, 32 lbs. spring). 
The exhibitors declared to run at 80 lbs. pressure, at 135 revolutions per 
minute, and at 9-horse-power. 
The cylinder is placed on the top of the fire-box. The crank-shaft, which 
is "bent" wrought iron, 3 inches in diameter, is carried on cast-iron brackets, 
attached near the front end of the barrel of the boiler in the ordinary 
manner. These brackets have the brasses placed at an angle, so that, as they 
are tightened down, compensation is given to both the horizontal and the ver- 
tical wear. 
The steam is taken from the boiler by means of an internal steam-pipe, 
which extends along the length of the barrel, and has a continuous slot on its 
upper side. There are also two holes for the inlet of steam, made in the elbow 
placed near the front of the fire-box, to which elbow the horizontal pipe is 
