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Table by which to find the relative state of Piston and Exhaust

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Example from the Table.-Suppose an engine with a stroke of six feet, or 72 inches, and the steam cut off when the piston is one-third from the end of its stroke, the cover on the exhaust side of the valve being 1-32d of its stroke, the relative positions will be the following:

In a line with 1-32d and under 1-3d is 113 and 073; therefore 113 x 728.136 inches the piston is from the end of the stroke, when the exhausting-port before the piston is shut, and 073 x 72 5.256 inches the piston is from the end of the stroke, when the exhausting-port behind it is open

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Table of Cylinders, with proportionate strokes for Steam-engines of nominal horse-power; the dense steam for Condensing Engines being seven pounds per square inch.

STATIONARY CONDENS- MARINE CONDENSING
ING ENGINES.

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ENGINES.

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HIGH-PRESSURE, OR NON-CON-
DENSING ENGINES.

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Table of Nominal Velocities for the Pistons of Steam-engines, with given length of strokes.

MARINE ENGINES.

HIGH-PRESSURE, OR NON-
CONDENSING ENGINES.

Length Number Velocity in feet per in feet and in. minute. per min.

Velocity

in feet

per min.

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·625 =

One foot, or 12 inches the integer.

9166 11 inches. 4166 5 inches. 0625 =

of inch.

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Table of the Circumferences and Areas of Circles, advancing by eighths and tenths.

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