23G 
MR. J. E. PETAVEL ON THE HEAT DISSIPATED BY A 
0009 
0003 
0-007 
0003 
0003 
8 
r- 0004 
^ o-ooa 
OOO! 
0009 
too aoo 3C 
ErnissrviCy iri^NiCroua 
>0 ^ 
Oxide. 
)0 6(. 
^0 61 
X) 70 
0 &. 
X) » 
00 1,0 
oo u 
oo 
where. E^EjnissivjCu tn CjQ.S.uni 
':s. 
yessure ir 
t f —Ct.t=Terrt 
? ACmosph 
oerACure t 
5 res. 
RAdiaXo 
r- 
— 
.o—- 
t LncLosu 
-e. ^ 
— 
14.^ 
iMmosp^ 
re>- 
y 
/ 
■“o 
...mheres- 
_ 
-- 
_ 
_ 
_ 
C-9dAtfnu^ 
— 
t?S; The fuU 
The poinCe 
Unes repr 
sreCheaeC 
'aenC Che above formuUc 
leJ, obser\heCions. 1. 
to 
0® 
0® 3i 
10° 4i 
Tie form uU 
'he docced i 
0° 6C 
hoCds ^Oi. 
ines reores 
0° 7C 
\d from 61 
inC Che Em. 
0° 8C 
040 ficmos 
ssiviCu ouE 
X)° s 
oheres, one 
ide Che re.n 
oo° i/y 
fromtotyCi 
fe of ithe fc 
00° u 
aoo^Cenc. ■" 
rmuL<%. 
00° ° 
0003 
0007 
0006 
0006 
0004 
0003 
Tempera^Cura in deOraes CenCi^rAde. 
Fig. 6. 
where E = emissivity in C.G.S. units, p = pressure in atmospheres, ^ = (Temperature 
of the Radiator—Temperature of the Enclosure) in degrees C. The values of the 
constants «, 6, a and ^8, are given in the following table 
Air .... 
Oxygen . . 
Hydrogen. . 
Nitrous oxide 
Car])on dioxide 
The formula holds good 
a X 10«. 
h X 
lO'’. 
a. 
(3. 
From ^ = 
To 5 = 
And from 
P = 
1! 
o 
H 
40.3 
1 
63 
0 
•56 
0 
21 
100 
1100 
7 
170 
387 
1 
39 
0 
•58 
0 
28 
100 
1100 
15 
115 
2750 
1 
88 
0 
•35 
0 
36 
300 
1100 
7 
113 
276 
1 
70 
0 
•74 
0 
28 
100 
800 
5 
40 
207 
1 
50 
0 
•82 
0 
33 
100 
1100 
10 
35 
