valve, o, and the latter communicating with the exhaust, r', through the
channel, s', in the said valve, o. The steam that passes to the back of
the piston, k, comes direct from the steam-chest, G, through the open
end of the channel, p, the valve, o, being at this time moved to one
side to leave the port, p, open. The steam is admitted to the back end
of the piston, k', from the steam-chest, G, through the channel, s", in
the valve, o, and from thence to the channel, p'. When the pistons, k
and k', have reached their inner positions the live steam is admitted
through the channels, q and q', direct from the steam-chest, G, to the
former, and through the recess, s cubed, and channel, s', in the valve, o, to
the latter, the exhaust steam back of the piston, K, passing out through
the channel, p, to the recess, s, in the valve, o, and thence to the
exhaust, r, the exhaust steam back of the piston, k, passing out through
channel, p', and through channel, s", in the valve, o, and thence to the
exhaust, r'.

"The valve-rod, o', is to be connected to a link and reversing lever as
usual, such being, however, omitted in the drawings."

The advantages claimed for it are that "it is composed of very few
parts, and it is very powerful on account of its having a separate steam
actuating piston for each of its driving-wheels. It has great strength
and resistance, owing to the fact that no pressure is exerted on the
journals on which the steam cylinders oscillate, and all the pressure
from the steam pistons is directly transferred to the crank-pins on the
driving-wheels. The engine is perfectly balanced in any position during
the stroke, and it may therefore be run at a much higher speed than the
common engines now in use."

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