512 
DR. WALTER NOEL HARTLEY ON THE ABSORPTION SPECTRA 
Table XII.—Absorption Bands in the Spectrum of Orthoxylene Vapour at Different 
Temperatures and Constant Pressure. 
Abbreviations :—s., strong ; f., feeble or faint; b., broad. 
(Photographic Plate 6, 1.6.06.) 
20° C. 
A. 
45° C. 
A. 
Observations on the spectra 
at higher temperatures. 
2696 
94 
91 
90 
89 
\ 84 
60 
58 
57 
52 
50 
\ 47 
42 
39 
\ 36 
19 
12 
09 
08 
05 
02 
\ 01 
2597 
94 
91 
\ 86 
72 
71 
69 
63 
61 
52 
49 
46 
45 
42 
40 
38 
\ 26 
} 
} 
} 
} 
} 
} 
} 
} 
} 
} 
} 
} 
s. 
s. 
s. 
s. 
s. 
s. 
r 
i. 
f. 
f. 
s. 
s. 
s. 
f. 
f. 
f. 
f. 
f. 
23 bands 
2710 
2695 
95 
94 
91 
89 
87 
\ 83 
78 
77 
71 
66 
63 
60 
59 
56 
52 
50 
47 
\ 45 
44 
42 
41 
39 
36 
s 33 
30 
19 
16 
\ 01 
| 2594 
\ 84 
| 70 
\ 59 
s. 
s. 
h 
h 
} 
} 
} 
f. 
f. 
f. 
f. 
f. 
f. 
At 72° C. All rays were transmitted as 
far as A 2738, and absorbed from A 2738 
to 2497. From A 2497 they were again 
transmitted to 2243, but very feebly to 
A 2332. 
At 100° C. Rays transmitted to A 2738. 
An intense absorption continued from 
A 2738 to 2421. Rays were transmitted 
from A 2421 to 2265. 
At 121° C. Rays were transmitted to 
A 2800, and intensely absorbed from 
A 2749 to 2332. They were transmitted 
again from A 2332 to 2269. 
21 bands 
