Page:Philosophical Transactions of the Royal Society A - Volume 184.djvu/568

Hydrogen, second volume—

				millims.
Height of mercury in manometer tube			=	155.0
Height of„ mercury in„ manometervolume tube„			=	145.5
Height of mercury Correction			+	9.5
Pressure of aqueous vapour	=	013.2
Pressure of Capillarity correction	=	003.9
	−	017.1
Barometer 791.7 − 28.0	=	763.7
Pressure of hydrogen = 763.7 + 9.5 − 17.1			=	756.1

Temperature = 15.70° C.

The oxygen volume and the first hydrogen volume were measured in the afternoon, the second hydrogen volume in the evening. This is why there is such a difference in the temperature and barometric pressure in the latter case.

Volume of residue, 6.5 = 15.3.

				millims.
Height of mercury in manometer tube			=	127.1
Height of„ mercury in„ manometervolume tube„			=	562.7
Height of mercury Correction			−	435.6
Pressure of aqueous vapour	=	013.3
Pressure of Capillarity correction	=	00.1
=	−	013.4
Barometer 791.4 − 28.2	=	763.2
Pressure of hydrogen = 763.2 − 435.6 − 13.4			=	314.2

Temperature = 15.80° C.

These volumes, when reduced to 0° C, and 760 millims. pressure, become—

For the oxygen	3826.3 × 753.3/760.0 × 273.00/288.92	= 3396.4
For the„ hydrogen	3826.3 × 753.6/760.0 × 273.00/288.97	= 3397.0
For the„ hydrogen„	3826.3 × 756.1/760.0 × 273.00/288.70	= 3411.5
For the residueTotal hydrogen volume		6808.5
For the residue (hydrogen)	15.3 × 314.2/760.0 × 273.00/288.80 =	5.98=6.0
For the residueHydrogen used		= 6802.5