Physical laboratory experiments : mechanics, optics and heat (1917)
Goodwin, H. M. (Harry Manley), 1870- · Boston : G. H. Ellis Co., Printers · leaf 80
arm, being com-pletely filled, can suffer no jar from a motion of the mer-cury, neither can air easily enter it through the capillarytube. Standard Barometer.—One excellent form of standardbarometer, constructed on the siphon principle, is shown inFig. 22. The barometer tube proper A, at least 25… … lateral arms. The tube isheld air tight in this cisternby means of a rubber stop-per, which is clamped be-tween two brass plates thelower of whi(;h forms thetop of the cistern. Onearm of the cistern is pro-vided with a steel stop-cock, D, which in turn isconnected to a reservoirof mercury, C, by…
Physics · Mechanics
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