Exhibited at Windsor, 
52S 
The peculiarity of the arrangement is that the engine proper 
is quite self-contained and independent of the boiler, so that it 
can be detached and used as a separate engine. The boiler is 
provided with wrought-iron brackets securely riveted on, and 
of sufficient breadth for the engine to stand in either direction. 
The cylinders are 6^ inches and 10 inches diameter, and 12 inches 
stroke ; the jackets are formed by ribbed liners forced into outer 
cases, the ribs adding very materially to the power of the liner 
to transmit the heat of the jacket steam to the inside surface of 
the cylinders. The steam connection between the cylinder cases 
and the boiler is formed by means of a boss riveted to the boiler 
and adjusted so that the cylinder case can be bolted to it. There 
is a boss under each cylinder bracket, but one only is in use at 
a time, the opposite one being covered by a blank flange. Steam 
passes in between the cylinders, and, rising up, enters the jacket 
space by holes near the top, thus preventing any priming from 
getting in. The condensed water drains away by a 1-inch pipe 
into the water space of the boiler. The steam ports of the 
cylinders are on their sides ; those of the high-pressure engine 
are symmetrical with the cylinder, but those of the low-pressure 
cylinder are placed below the centre so as to drain the cylinders 
completely by gravitation, the exhaust port being lower even 
than the two steam ones. The exhaust pipe is arranged to con- 
nect either laterally below the steam chest, or at either end, so 
that the cylinders can be worked in any position. The high- 
pressure slide-valve has a passage through it which serves 
to give additional admission to the steam, and so to insure 
full pressure in the cylinder at the commencement of the 
stroke. 
The cylinders are connected to the crank shaft-bearings by 
hollow frames, in which are formed the crosshead slides. The 
crank-shaft bearing brasses are parted vertically and set up by 
wedges and screws. The feed heater is placed under the boiler 
and extends from the fire-bos to beyond the smoke-box ; it is 
composed of a rectangular cast-iron case fitted with six 1-inch 
tubes, throusrh which the feed water circulates, and round which 
the exhaust steam plays, entering near the fire-box end and 
issuing by a vertical blast pipe into the chimney. The feed 
water passes six times backwards and forwards through the 
tubes, which are secured in the tube plates by means of small 
glands and rubber packings very like those used for glass 
gauges ; the glands also form caps for closing the holes corre- 
sponding to the tubes in the outer case, and thus alFord good 
access for cleaninsf the tubes. The water is said to be heated 
to over 200° Fahr. The engine is intended to work at 140 lbs. 
VOL. XXV. — s. s. M M 
