PLATINUM SURFACE AT HIGH TEMPERATURES. 
251 
Table YL—Emissivity in Nit.rous Oxide. 
0-93 atmosphere at 
16'’ C. 
5-66 atmospheres at 
16° C. ! 
' 
14-48 atmospheres at 
16° C. 
39 - 0 atmospheres at 
16° C. 1 
1 
Tempera¬ 
ture ^ in 
i 
Tempera- 
Tempera- 
Emissivity 
Tempera- 
Emissivity 
Emissivity 
ture in 
Emissivity 
ture S in 
ture S in 
degrees 
in C.G.S. 
degrees 
in C.G.S. 
degrees 
in C.G.S. 
degrees 
in C.G.S. 
Centi¬ 
grade. 
units. 
Centi¬ 
grade. 
1 
units. 
Centi¬ 
grade. 
units. 
Centi¬ 
grade. 
units. ! 
i 
1 
. - - 1 
60-8 
0-000647 
90-6 
0-001292 
78-5 
0-001962 
124-8 
0-004687 i 
192-8 
0-000898 
289-7 
0-001922 
263-0 
0-002835 
207-9 
0-005161 1 
311-4 
0-001126 
i 642 - 0 
0-002842 
418-4 
0-003378 
337 - 6 
0-005782 1 
585 - 6 
799-2 
1066-5 
0-001546 
0-002003 
0-002773 
1138-9 
0-004296 
605 -1 
844-5 
1093-3 
0-004006 
0-004967 
0-005653 
1 
576-4 
732-2 
807-3 
j 1080-8 
115-3 
264-2 
485 - 9 
0-006839 
0-007383 
0-007796 
0-008325 
0-004712 
0-005498 
0-006505 
Table VII. 
Emissivity in liquid carbon dioxide. 
i 
Emissivity in liquid nitrous oxide. 
Temperature S 
in degrees Centigrade. 
i 
Emissivity in 
C.G.S. units. 
Temperature d 
in degrees Centigrade. 
Emissivity in 
C.G.S. units. 
1 
1 5-9 
0-27* 
7-4 
0 -11* 
7-0 
0-27* 
9-7 
0 -12* 
176-7 
gas. 
0-016 
10-5 
0-15* 
84-8 
0-018 
11-1 
0 -20* 
98-8 
0-017 
1 11-4 
0-26* 
308-1 
0-016 
i 
gas. 
463 - 9 
0-016 
308-5 
0-015 
■* These measurements are only given as preliminary and altogether approximate values; as already 
stated, the apparatus is not suitable for measurements depending on small tem2:)erature intervals. 
2 K 2 
