A history of the growth of the steam-engine . \~y Via. 30. Mercury Glass Water-Gange. To determine the height of water in his boiler, Wattadded to the gauge-cocks akeady long in use the glasswater-gauge, which is still seen in nearly every well-ar- 118 THE DEVELOPMENT OF THE MODERN STEAM-ENGINE. ranged boilei-. This was a glass tube, a a (Fig. 30),mounted on a standard attached to the front of the boiler,and at such a height that its middle point was very lit-tle below the proposed water-level. It was connected bya small pipe, r, at the top to the steam-space, and an-other little
A history of the growth of the steam-engine . \~y Via. 30. Mercury Glass Water-Gange. To determine the height of water in his boiler, Wattadded to the gauge-cocks akeady long in use the glasswater-gauge, which is still seen in nearly every well-ar- 118 THE DEVELOPMENT OF THE MODERN STEAM-ENGINE. ranged boilei-. This was a glass tube, a a (Fig. 30),mounted on a standard attached to the front of the boiler,and at such a height that its middle point was very lit-tle below the proposed water-level. It was connected bya small pipe, r, at the top to the steam-space, and an-other little pipe, r, led into the boiler from its lower endbelow the water-line. As the water rose and fell withinthe boiler, its level changed correspondingly in the little instrument is especially liked, because the posi-tion of the water is at all times shown to the eye of theattendant. If carefully protected against sudden changesof temperature, it answers perfectly well with even veryhigh pressures. The engines built by Boulton & Watt were finally fittedwith the cran
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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines
