RADIATION IN ABSOLUTE MEASURE. 
G09 
Table IV.—Copper globe sooted. (Apparatus, tig. 2.) 
March 29, 1890. Globe 
freshly sooted, very 
thin coat, but very com- 1 
plete and uniform. 
Air. Pressure 75'6 
centims. Temperature of 
bath sun’ounding 
enclosure 17°‘5 0. 
April 8, 1890. Vacuum. 
Pressure — M. 
5-1 
Temperature of bath surrounding 
enclosure 15° C. 
! 
April 10, 1890. Dry air admitted to 
enclosure of April 8. 
Pressure 75-5 centims. 
Temperature of bath surrounding i 
enclosure 15°-5 C. 
Excess 
of tem¬ 
perature 
of globe 
above tem¬ 
perature 
of sur¬ 
roundings. 
Loss of heat 
per sq. 
centim. 
per second 
per 1“ C. of 
excess. 
: 
Excess of 
temperature 
of globe 
above tem¬ 
perature of 
surround¬ 
ings. 
Average loss of heat per 
sq. centim. per second 
per 1° C. of excess, 
between the tem¬ 
peratures indicated iir 
preceding column. 
Excess of 
temperature 
of globe 
above tem¬ 
perature of 
surround¬ 
ings. 
Average loss of heat per 
sq. centim. per second 
per 1° C. of excess, 
between the tem¬ 
peratures indicated in 
preceding column. 
221-0 
3-92 X 10-^ 
2.30-4 
250-3 
1 
189-9 
3-82 
2-23 X 10^^ 
1 
4-44 X 10- t 
155-5 
3-68 
-204-6 
217-3 
128-2 
3-55 
2-00 
4-26 
106-5 
3-42 
1S4-0 
189-6 
89-1 
3-29 
1-78 
4-12 
75-0 
3-16 
152-2 
173-7 
63-6 
3-03 
1-63 
3-81 
54-3 
2-90 
139-5 
157-0 
46-7 
2-77 
1-52 
3-70 
40-4 
2-64 
128-7 
142-2 
35-3 
2-51 
1-44 
3-70 
31-0 
2-38 
119-2 
126-4 
1-42 
' 
3-63 
110-5 
1 116-9 
1-36 
i 
3-55 
102-8 
106-4 
1-27 
1 
3-48 
96-1 
89-25 
1-29 
1 
1 
3-23 
89-7 
81-9 
1-20 
3 02 
84-1 
58-5 
1-22 
2-98 
CO 
00 
49-9 
1-20 
2-86 
74-0 
' 
42-9 
1-26 
69-2 
1-15 
65-0 
1-07 
61-4 
4 I 
MDCCCXnil.—A. 
