Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 63
rm an atmosphere line. A communication is then opened with the interior of the cyliiiii>,r of the engine by turning the cock C, and a figure or diagram is traced upon the slip of paper, exiicuy representing the successive pressures of the steam above, and corresponding degrees of exhaustionbelow… … of equal parts, the perpendicular distances of the outline of the diagram above and below the atmosphere line at each of these points, to be carefully measured upon the scale of the instrument, and theBum of these to be divided by the number of points taken. Hence the actual power of the engine…
Mechanical engineering
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