Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 70
il of a Mer-plied to our inspectors. The apparatus consists in a cury Gauge. pump, by which the gauge can be subjected to a water pressure, and a long, verticalglass tube, into which mercury rises to measure the pressure. The mercury is containedin an iron reservoir, as shown in Fig. 1. Two tubes… … f56 THE LOCOMOTIVE. [May, to. iuto which the mercury rises. The apparatus is so simple that it hardly needs fur-ther explanation, except on the one point of fixing the graduation marks on the scale.This appears to be simple enough, but as we have frequent letters asking how it is done,we shall…
Locomotives · Steam-boiler explosions
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