Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 128
one convenient form of barometer, For-tins (Fig. 61), the cistern has a flexible bottom, and a littleivory pointer establishes the level of the mercury. Ascrew in the lower part of the cistern makes it possible toraise and lower the flexible bottom, and so adjust the levelof the mercury to the… … Other liquids may be used in a barometer. The specialadvantage of mercury is that its great density makes thecolumn conveniently short. Its disadvantage is that thevariations in h are correspondinglysmall. In a water barometer we havethe reverse conditions, an inconvenient-ly long column, 76 cm. X…
Physics
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