Hartford Steam Boiler Inspection and Insurance Company · Hartford, Ct. : Hartford Steam Boiler Inspection and Insurance Co · leaf 68
ere taken by means of a telescope, whichwas rigidly fixed, and placed so that the upper ends, or meniscuses, of the twomercury columns could both be seen in the field of view of the telescope at thesame time. The telescope was provided with a micrometer eyepiece, whoseerrors were carefully… … Fig. 2. — Showing the Experimental Tube Filled and in Position. mercury in the two arms of the gage was obtained by turning the screw of themicrometer eyepiece so that the cross-hair rested first on one of the meniscuses,and then on the other. By the side of this telescope there was a second…
Locomotives · Steam-boiler explosions
Internet Archive · Carnegie Library of Pittsburgh · Public Domain Mark 1.0. Free to use for anything.
