Report on the Trials of Implements at Oxford. 455 
adjustment by means of set screw on tlic shaft. Cuts off steam at 3i inches. 
Feed-pump driven by separate eccentric. Tliere is no feed-water heater to 
this en,>;ine, but one would be supplied within the price. The feed is regulated 
by cock and suction, or cock to allow part of the water pumped to return. 
Lock-up safety-valve as well as usual safety-valve. Large lubricator to 
cylinder and crank end of connection-rod. Governor on top of boiler driven by 
strap and bevelled wheels. Balance-weight to fly-wheel ; no drum to crank- 
shaft. Cylinder steam-jacketed, lagged with felt and wood and sheet-iron. 
Four guide-bars to piston. Boiler provided with two gauge-cocks and glass 
gauge. Jet-blast to chimney. ProiJer mudhole doors, and blow-ofi' screw 
valve. Ash-pan, with close-fitting damper ; chain adjustment. Barrel of 
boiler 2 feet 2 inches diameter. Outside dimensions 2 feet 10 inches wide by 
8 feet 10 inches. Smoke-bos 2 feet 8 inches diameter, 1 foot ^ an inch long. 
Fly-wheel projects 1 foot lOJ inches from centre line of engine, and is within 
the length of the boiler. Chimney 7 feet 4 inches high, 7J inches diameter. 
Fire-box, outside 1 foot 11^ inches, inside 1 foot 5j inches fore and aft ; width 
inside, 2 feet and 2 an inch ; three inches of brick on the side next fire-door, 3 
inches against tube-plate, and 4J inches on right-hand side only, leaving the 
fire 1 foot 8 inches by 11 inches. Total weight, 2 tons 4 cwt., of which the 
wheels, which are provided and included in price, are from 3J to 4 cwt. 
No. 13. C. D. Eagles, 6793. — Upright boiler with jjlain fire-box, having two 
cross tubes only. Large fire, wide bars. Horizontal engine, fixed on cast-iron 
tank, on which boiler stands. Cylinder Q\ inches diameter; 10 inches stroke; 
100 revolutions per minute. Single slide only, with eccentric bent in S form. 
Guide-block working in guide on bed-plate under overhanging guides, so that 
guide-block is T shaped. Feed-pump small, projects outside connecting-rod 
and guides, working upon small bearings. The governor stands over the 
crank-shaft, and is driven by friction only. The fly-wheel is not balanced, 
and the band-wheel outside is too small for its work (2 feet diameter, 6 inches 
wide). The engine is badly fitted. The brasses have plain plummer-blocks. 
Cylinder lagged with thin wood and not steam-jacketed. Glass gauge ; no 
gauge-cock ; no blow-olf cock ; no close ashpan or damper. Boiler provided 
with mudhole doors, and mudhole doors to water-tank in bed-plate. Fire-box 
2 feet 4| inches diameter inside ; bars f inch wide, §tlis spaces. Water-space 
and thickness of tube plates 3 inches. Diameter of shell of boiler 2 feet 
lOj inches. Base 4 feet 5 inches, by 4 feet 9 inches. Height 5 feet 7j inches. 
Fly-wheel projects sideways 7 inches, and 1 foot 65 inches bej'ond end. 
N.B. — In working, the chimney was constantly red-hot; the ashes fired the 
timbers on which the engine stood, there being no close ash-pan or damper ; 
and the bed-plate cracked right through, and the consumption of fuel was 
enormous. 
No. 14. Davey, Paxman, and Davey, 7100. This was a 4-horse vertical 
engine, attached to its boiler, the cylinder acting invertedly upon the crank- 
shaft, which was close to the foundation plate upon which the boiler was fixed. 
The diameter of the cylinder was Gf inches, and its stroke 1 foot. The 
exhibitors elected to run at 115 revolutions. The boiler consisted of an outer 
cylindrical shell, 7 feet 3 inches high by 2 feet 7 inches diameter. It con- 
tained a cylindrical fire-box, 2 feet in diameter, and 4 feet 3 inches high above 
the fire-bars. From the centre of the top of this box a 7^ inch tube went up 
through the top plate, forming the central chimney. From the crown of the 
box there depended sixteen 2j inch (external) diameter tubes, which hung 
down about three feet, and then, by means of a bend, turned, round so as to 
present their lower ends to the circumference of the fire-box, with which they 
were united. Thus these tubes were filled with water, having a connection 
with the water-spaces at their bottoms, with the sides of the fire-box, and at 
their tops at the crown of the fire-box. There was a concave diaphragm 
