REFRACTIVE INDEX OF GASES ON TEMPERATURE. 
453 
(14-625 ± -01) (1 + -000398^) 
1 + 7 ( -00416 ± '00002) 
This gives for the refi’active index 
^ ^ , (-0006553 zb '0000005) (1 -|- -000398/^) p 
~ I -j- ^ (-00416 ± -00002) ' 76 ’ 
At 76 centims. pressure and 0° C. 
= 1 + -0006758 ± -0000005. 
\ 
V 
S 
oh 
if 
J 
io. 
Eii 
le 
rv 
1 
)2i 
> 
1+ 
•u 
04 
lb 
t“ 
A 
\ 
7) 
A 
\ 
A 
\ 
\ 
\ 
\ 
\ 
\ 
\ 
\ 
14-5 
14-3 
14-1 
13-9 
13-7 
13-5 
13-3 
13-1 
12-9 
12-7 
12-5 
12-3 
12-1 
11-9 
11-7 
11-5 
11-3 
ll-l 
10-9 
10-7 
10-5 
0” 10° 20° 30° 40° 50° OO'’ 
Temperature Centigrade. 
TO-- 
80° 
Diagram V. 
