ABSORPTION SPECTRA OP THE ALKALOIDS. 
499 
2 cub. centims. of O'l grm. in 25 cub. centims. of alcohol of sp. gr. 0’8, diluted 
to 8 cub. centims. = 1 in 1000 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
4 
Continuous to. 
324.V5 
3 
Same as the last spectrum. 
2 
Continuous to. 
3171 
1 
Continuous to. 
3008 
2 cub. centims. of O’l grm. in 25 cub. centims. of alcohol of sp. gr. 0'8, diluted 
to 80 cub. centims. = 1 in 10,000. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
10 
Continuous to. 
2740 
9 
Same as last spectrum. 
8 
Same as last spectrum. 
7 
Same as last spectrum,, but slightly 
6 
stronger. 
Same as last spectrum. 
5 
Same as last spectrum. 
4 
Same as last, stronger. 
3 
Continuous to. 
2418 
2 
Continuous to. 
2418 
1 
Continuous to. 
2310 
Cotarnine Hydrobromide. From Dr. C. R A. Wright. 
The original solution diluted to five times its volume, or 1 in 1000. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
5 
Continuous to. 
4143 
Absorption band. 
4061 to 2747 
4 
Continuous to. 
4061 
Absorption band. 
4061 to 2747 
3 
The spectrum is substantially the same 
2 
as that transmitted by 4 millims. 
Continuous to. 
3982 
Absorption band. 
3982 to 2747 
Spectrum extends to. 
2696 
1 
Continuous as above to. 
3982 
Absorption band. 
3982 to 2872 
Rays transmitted weakly to ... 
2696 
