The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . Fin. Com pressed All €ter. 49(5 MAN- M. A, N. Section of D( Manometer. vith the vessel contaiuin:; the fluid whose pressure 4s to be mr/.-jurecl. The compressed fluid acting upon T depresses the piston D^nd causes the mercury to rise in AB. Let p be the pressure of the fluid per unit of area, 5 the area ofT, and S the irea ofD ; also let P be thepressure per unit ofar
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . Fin. Com pressed All €ter. 49(5 MAN- M. A, N. Section of D( Manometer. vith the vessel contaiuin:; the fluid whose pressure 4s to be mr/.-jurecl. The compressed fluid acting upon T depresses the piston D^nd causes the mercury to rise in AB. Let p be the pressure of the fluid per unit of area, 5 the area ofT, and S the irea ofD ; also let P be thepressure per unit ofarea as record ;d bythe .of themercury in AB. IhuaevideiitiY »we have yrf=PS\:oi*s; = -P; Ileiiceby makingH very great and 5vcy small a verygreat pressure canBo measured by acomparatively shortoohima of mercuryin Aa As part ufthe pressure;? is em-ployed to stretch theiiulia-rubber mem-brane, the ratio S: sshould be made vciycrcat, so that D willonly sink 0. veryshort distance. Caille-tvt, who employedthis manometer inhis experiments onthe. compressibilityof fluids, had it saarranged that (tie-plectinrr the stretcli-iiip of the india-lubber) the mercuryill AB rose 4*3 metres while the piston in D sunk only one-eighthof a millimetre. Metallic manometers depend
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Keywords: ., bookauthorbaynesth, bookcentury1800, bookdecade1890, bookyear1892
