OF THE VAPOURS OF BENZENE AND ITS HOMOLOGUES. 
493 
Table I. (continued). 
12°-7 C. 
25° C. 
43° C. 
53° C. 
References. 
A. 
A. 
A. 
A. 
A. 
2349 v.f. 
2347 G., 46 F. 
2343 
43 v.f. 
42 f. 
30 
2330 
41 G., 37 F. 
Friederichs’ 8th 
24 
24 s. 
25 
20 
28 F. 
19 F. 
group. 
08 
07 
15 
08 F. 
05 
07 
05 F. 
/ 
2294 
2295 
2277 
59 
77 
69 
67 
2270 F. 
59 F. 
/ 
Friederichs’ 9th 
group.* 
2226 
t 
55 bands 
84 bands 
82 bands 
56 bands 
* In Kayser’s ‘ Handbucli cler Spectroscopie/ vol. III., p. 368, these bands are given as the beginnings 
of a probable 9th group. 
f On the photographs several distinct and well-defined bands are seen here, but under the microscope 
they are too indistinct to be measured. 
Table II.—Absorption Bands in the Spectrum of Benzene Vapour at 11 0 *5 C. and 
Different Pressures. 
Abbreviations :—s., strong; £, feeble; n., narrow ; v.s., very strong; b., broad. 
778 mm. 
A. 
483 mm. 
A. 
253 mm. 
A. 
21 mm. 
A. 
778 mm. 
A 
(continued). 
483 mm. 
A 
(continued). 
253 mm. 
A 
(continued). 
21 mm. 
A 
(continued). 
2700 
f.n. 
2706 f. 
2678* 
2680* 
26951 
K 
2695 1 f 
91 j r ‘ 
2676 f. 
76 n. 
781 
781 
91 j 
2691 n. 
75 n. 
75/ 
75 j 
901 
90 
89 n. 
a 
75* 
88 I 
> 
85 
711 
11 } * 
7n 
711 
811 
K 
83 d f 
80 J 1 ' 
82 1 
s 
69 J s ’ 
69 j 8 ' 
69 j s - 
78 j 
80 J 
67 ] 
* A very narrow distinct band at each of these positions lies so close to the next band as not to be distinctly 
measureable. See pp. 478, 479. 
