ntinuously when indicating 11,000 horse power with 175 lbs. of steam
pressure, a speed of 75 revolutions and a 26-inch vacuum without
normal wear, jar, noise, or other objectionable results. Second. It
will be suitably proportioned to withstand in a serviceable manner all
sudden fluctuations of load as are usual and incidental to the
generation of electrical energy for railway purposes. Third. It will
be capable of operating with an atmospheric exhaust with two pounds
back pressure at the low pressure cylinders, and when so operating,
will fulfill all the operating requirements, except as to economy and
capacity. Fourth. It will be proportioned so that when occasion shall
require it can be operated with a steam pressure at the throttles of
200 pounds above atmospheric pressure under the before mentioned
conditions of the speed and vacuum. Fifth. It will be proportioned so
that it can be operated with steam pressure at the throttle of 200
pounds above atmospheric pressure under the before mentioned condition
as to speed when exhausting in the atmosphere. Sixth. The engine will
operate successfully with a steam pressure at the throttle of 175
pounds above atmosphere, should the temperature of the steam be
maintained at the throttle at from 450 to 500 degrees Fahr. Seventh.
It will not require more than 12-1/4 pounds of dry steam per indicated
horse power per hour, when indicating 7,500 horse power at 75
revolutions per minute, when the vacuum of 26 inches at the low
pressure cylinders, with a steam pressure at the throttle of 175
pounds and with saturated steam at the normal temperature due to its
pressure. The guarantee includes all of the steam used by the engine
or by the jackets or reheater.

The new features contained within the engine construction are
principally: First, the novel construction of the high-pressure
cylinders, by which only a small strain is transmitted through the
valve chamber between the cylinder and the slide-surface casting.
This is accomplished by employing heavy bolts, which bolt the shell of
the cylinder casting to the slide-surface casting, said bolts being
carried past and outside the valve chamber. Second, the use of poppet
valves, which are operated in a very simple manner from a wrist plate
on the side of the cylinder, the connections from the valves to the
wrist plate and the connections from the wrist plate to the eccentric
being similar to the parts usually employed for the operation o