OF THE VAPOURS OF BENZENE AND ITS HOMOLOGUES. 
511 
Table XI.—Absorption Bands in the Spectrum of Ethylbenzene Vapour at Different 
Temperatures and Constant Pressure. 
Abbreviations :—s., strong; b., broad; £, feeble or faint; v.s., very strong. 
(Photographic Plate 5b, 5.9.06.) 
20° C. 
A. 
\ 
P 
New 
\ 
N 
2671 
69 
69 
67 
66 
40 
36 
35 
33 
31 
14 
05 
03 
02 
2599 
97 
New 
s 
\ 
s 
\ 
}, 
s. 
n. 
f. 
s. 
s.b. 
s. 
95 
91 
88 
84 
82 
80 
54 
49 
43 
41 
38 
35-5 
32 
30 
2473 
71 
18 
\ 17 
2365 
17 bands 
n.f. 
s. 
v.f. 
v.f. 
f. 
s. 
s. 
s. 
s. 
f. 
v.f. 
36° C. 
A. 
\ 
P 
New 
\ 
2671 
63 
40 
36 
35 
32 
31 
25 
20 
18 
16 
02 
01 
2598 
94 
91 
53 
47 
45 
40 
38 
35- 
31 
29 
2472 
70 
18 
\ 16 
2363 
\ 
\ 
b.s. 
s. 
f.b. 
P' 
} 
s. 
s. 
s. 
v.f. 
15 bands 
C. 
\ 
I 
\ 
2689 
81 
78 
63 
58 
23 
18 
17 
2365 
f. 
s.b. 
b.v.f. 
v.f. 
v.f. 
General absorption 
very strong 
on 
either side of Cd 18, 
this line being very 
faintly visible. 
5 bands 
71° C. 
A. 
2421 
15' 
12 
02 
V 3 66 
f. 
P 
v.f. 
Cd 18 very 
faintly seen 
through the 
general ab¬ 
sorption ex¬ 
tending from 
AA 2654 to 
2475. 
3 bands 
100° C. 
A. 
Complete ab¬ 
sorption of 
all rays 
between 
AA 2716 
and 2331. 
Cd 18 not 
visible. 
The bands of the e group are difficult to measure because they become merged into one broad band 
by the over-lapping general absorption at temperatures above 40° C. See Table X. 
