ON THE MEASUREMENT OF TEMPERATURE. 
149 
Vapour Pressure of Liquid Oxygen. 
Pressure on gas 
in thermometer. 
Temperature of 
dead-space. 
Temperature 
of stem. 
Vapour pressures 
of 
liquid oxygen. 
Tempe 
Found. 
rature 
Calculated. 
millims. 
°C. 
° He. scale. 
millims. 
° He. scale. 
° He. scale. 
(«) March 13th, 1902. 
324-5 
18-2 
199 
764-0 
90-36 
90 - 25 
326-45 
18-3 
208 
685-5 
89-22 
89-22 
(h) March 17th, 1902. 
322-9 
17-8 
165 
677-5 
89-10 
89-12 
323-2 
17-8 
169 
682-1 
89-18 
89-18 
323-5 
18-0 
176 
686-7 
89-27 
89-25 
323-6 
18-0 
180 
688-2 
89-29 
89-28 
(II.) Thermometer A. 
The thermometers were filled with helium purified hy passing it through a coil 
immersed in liquid hydrogen at its hoiling-point (Appendix III.). 
Ice-Point of Thermometers, April 17th and March 25th, 1902. 
Pressure on gas 
in thermometer. 
Temperature of 
dead-space. 
Constant. 
millims. 
°C. 
.. r • . f March 25th. 
Maintherm.onieter|^p^jj 17th. 
976-94 
976-42 
18-9 
15-5 
44-769 
44-756 
Auxiliary thermometer. 
996 
16 
7-73 
Vapour Pressure of Litpiid Oxygen. 
Pressure on gas 
in thermometer. 
Temperature of 
dead-space. 
Temperature 
of stem. 
Vapour pressures 
of 
liquid oxygen. 
Temperature 
Found. 
Calculated. 
millims. 
324-75 
324-75 
° C. 
20-0 
20-4 
° He. scale. 
175 
167 
millims. 
675 - 5 
677-0 
° He. scale. 
89-10 
88-96 
° He. scale. 
89-09 
89-13 
