ABSORPTION SPECTRA OP THE ALKALOIDS. 
497 
•1 grm. in 40 cub. centims. of alcohol of sp. gr. 0'8, third dilution or 1 in 50,000. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
5 
Continuous to termination of spectrum 
2572 
4 
Continuous to. 
2545 
Ill-defined absorption band from . . 
2545 to 2313 
Rays transmitted feebly to ... 
2265 
3 
Very strong, continuous to ... 
2862 
Continuous, and fairly strong to 
2572 
Ill-defined absorption band from . . 
2545 to 2313 
Rays transmitted to. 
2265 
2 
The same description and measurement 
1 
are applicable, the lines being a little 
stronger. 
Continuous to.. 
2572 
Absorption band visible. 
2545 to 2313 
But lines are transmitted very feebly f 
2495,2483,2429, 
at.| 
2422, 2355 
Spectrum ends at. 
2255 
Narcotine. From Messrs. T. and H. Smith and Co. Plate 55, fim 6. 
7 O 
0'2 grm. dissolved in 20 cub. centims. of alcohol of sp. gr. 0'8 = 1 in 200. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave lengths. 
millims. 
5 
Strong, continuous to. 
3464 
4 
Strong, continuous to. 
3403 
3 
Strong, continuous to. 
3403 
2 
Strong, continuous to. 
3352 
1 
Strong, continuous to. 
3352 
0'2 dissolved in 200 cub. centims. of alcohol of sp. gr. 0'8 = I in 1000. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths, 
millims. 
5 
Strong, continuous to. 
3352 
4 
Somewhat doubtful trace. 
Strong, continuous to. 
3352 
Absorption band from. 
3330 to 2707 
Rays transmitted to. 
2705 
3 
Strong, continuous to. 
3330 
Absorption band from. 
3252 to 2839 
Rays weakly transmitted to ... 
2572 
2 
Strong, continuous to. 
3330 
Absorption band from. 
3262 to 2839 
Rays transmitted to ...... 
2572 
1 
Strong, continuous to. 
3260 
Spectrum continuously transmitted to 
2545 
