62 
Report of the Jud(jes on the 
^onger as to contain the whole length of the cylinder, leaving only false covers 
visible, back and front. The cylinder, notwithstanding it is in the smoke-box 
(perhaps it would be well to say, because, among other reasons, it is in tlie 
smoke-box), is steam-jacketed both on the sides and ends. 1'he circumferen- 
tial steam-jacketing is done by the forcible insertion of a turned and bored 
steel bush, into the bored recessed jacket-casting. 
It is believed that this plan was introduced by the Reading Ironworks 
Company (Limited) in their engines tried at tlie Oxford Show. . 
Lugs are formed on the jacket-casting ; and from these two solid wronglit- 
irou stay-rods extend to the crank-shaft bearings, which, in the instance t)f 
this engine, are situated over the barrel of the boiler, and near to the fire-box. 
The crank-shaft is carried in three gun-metal bearings, with side-way adjust- 
ment in all three, and with vertical adjustment to the bearing near to the fly- 
wheel. These gun-metal bearings are seated in cast blocks, provided with chan- 
nels round about them to collect the oil which may escape from the bearings, 
and the blocks are furnished with bosses to receive the ends of the stay-rods, 
by which they are united, as alreadj^ mentioned, to the jacket-casting. 
The cast bearings are bolted to the tops of wronght-iron- brackets, which are 
riveted direct to the barrel of the boiler. 
The suggestion is tbat there is sufdcient "give" in these wrought brackets 
to allow for any movement due to the exjiansion of the boiler, whilst the stay- 
rods take the true strain arising from the engine. 
The crank-shaft is not " bent, " but is made out of the solid ; it is of steel, 
and is provided with two disks, fitted one on each arm of the crank, in which 
disks are cast blocks to balance the crank. The shaft has on it three eccentrics, 
• one to work the main-slide, one the expansion-slide, and the other the feed-pump. 
The steam is admitted into the cylinder through a throttle-valve, which, 
however, during the runs was not in use, the engine being governed by the 
expansion-slide. 
In the jacket there is the main-slide, comjDOsed of two separate short-slides 
made of cast steel (not cast to shape, but cut out of the solid) and united by a 
casting to which they are bolted. On the back of these slides works a pair of 
expansion-slides ; each of these slides is provided with two horns, the horns of 
the one slide lying witliin the horns of the other, like the common arrangement 
in a dining-room expanding table, and so that (also like such a table) the slides 
can be moved in and out telescopically, and at the same time preserve their 
true and piroper relation, as to level and surface. 
On each of the slides there is a jirojection carrying a gun-metal nut free to 
move sideways, in which nuts the slide-stalk works. 
This stalk is of steel, and has on it two triple-threaded screws, one for 
each nut. 
The screws are of about If pitch, so that \ of a revohrtion of the slide-stalk 
will vary the length of the expansion-slides a little over half an inch at each 
end. 
The slide-stalk works in a collar, and a pinion is passed over it, having a 
key taking into a slot in the slide-stalk, which pinion is worked by a sector (of 
a radius laiger than that of the pinion) moved by the governor. 
There is an adjusting screw to regulate the position of the sector in relation 
to the governor. As the governor balls fly out, they work the sector and 
pinion, to turn the slide-stalk, and thereby separate the slides, so as to cause 
them to cut off earlier. At the same time the governor raises a weight, at- 
tached to a cord passed round a pulley, having a feathered boss through which 
the stalk slides. 
This weight causes the slide-stalk to revolve in the direction proper to 
shorten the slides, so as to diminish the expansion. 
The sector before spoken of is not rigidly attached to the governor, but is 
