Appleton's dictionary of machines, mechanics, engine-work, and engineering . 56 INDICATORS. C shut, so as to form an atmosphere line. A communication is then opened with the interior of the cyl-inder of the engine by turning the cock C, and a figure or diagram is traced upon the slip of paper, ex-acLy representing the successive pressures of the steam above, and corresponding degrees of exhaustionbelow the atmosphere line, at every part of the stroke. To find the mean effective values of each ofthese pressures respectively, the figure is to be divided, in the direction of its length, into any
Appleton's dictionary of machines, mechanics, engine-work, and engineering . 56 INDICATORS. C shut, so as to form an atmosphere line. A communication is then opened with the interior of the cyl-inder of the engine by turning the cock C, and a figure or diagram is traced upon the slip of paper, ex-acLy representing the successive pressures of the steam above, and corresponding degrees of exhaustionbelow the atmosphere line, at every part of the stroke. To find the mean effective values of each ofthese pressures respectively, the figure is to be divided, in the direction of its length, into any number. 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 thesum of these to be divided by the number of points taken. Hence the actual power of the engine iseasily calculated.
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
