DR. A. SCOTT OR THE COMPOSITIOR OF WATER BY VOLUME. 
555 
Hydrogen, second volume— 
niillims. 
Height of mercury in manometer tube.z=l55'0 
,, ,, volume ,, .= 145‘5 
Correction.+ 9'5 
Pressure of aqueous vapour.= 13’2 
Capillarity correction 3‘9 
- 17-1 
Barometer, 791'7 — 28’0.= 7637 
Pressure of hydrogen = 7637 + — 17’1 . . , . = 756'1 
Temperature, 1570° 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 differeuce 
in the temperature and barometric pressure in the latter case. 
Volume of residue, 6*5 = 15’3. 
millims. 
Pleight of mercury in manometer tube.=127‘1 
„ ,, volume ,, .= 5627 
Correction.—435'6 
Pressure of aqueous vapour. =13-3 
Capillarity correction . . . . = -1 
= - 13-4 
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 X f|f^ X f = 3396-4 
„ hydrogen .... 3826-3 X ^ X = 3397-0 
... 3826-3 X fip X-Ufif^ =3^5 
Total hydrogen volume. 6808-.5 
For the residue (hydrogen) 15-3 X IW- X = 5-98 := 6-0 
Hydrogen used ... . . . . = 6802-5 
4 B 2 
