Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 372
nstruction to those employed in ane-roid barometers, and the weight of themercury is balanced in the centre of thediaphragm, by the elastic force of care-fully tempered steel springs whose lengthis the same as that of the mercury column.Both ends of the column are open to theatmosphere, so that its… … 316 Civil and Mechanical Engineering. temperature, but in a different ratio to that of the dilatation andconsequent diminution of the density of mercury, this had to bearranged for in the mechanical arrangement of the instrument. Itis evident that if the mercury were contained in a cylindrical…
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