506 
PROFESSOR W. N. HARTLEY ON THE 
0’1 grm. in 100 cub. centims. of alcohol of sp. gr. 0‘8. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millions. 
5 
Continuous to. 
3008 
Absorption band. 
3008 to 2847 
Rays transmitted faint to. 
2740 
4 
Continuous to. 
3033 
Absorption band. 
2976-5 to 2869 
Rays transmitted to. 
2705 
3 
Continuous to. 
3033 
Rays transmitted feebly and con¬ 
tinuously to. 
2869 
2 
Continuous to. 
3171 
Weak to . 
2418 
1 
Continuous to. 
2307-5 
Ceyadine. From Dr. C. R. A. Wright (Merck’s Yeratrine). 
0'1 grm. in 20 cub. centims. of alcohol of sp. gr. 0'8. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
A thickness of liquid equal to 20 
millims. transmits all rays strongly 
to. 
2735 
5 
Transmits all to. 
2556 
1 
Transmits all to. 
2518 
No absorption band visible. 
Brucine. Plate 56, fig. 5. 
0'1 grm. in 25 cub. centims. of alcohol of sp. gr. 0 - 8. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
5 
Continuous, strong to. 
3246 
4 
Continuous, strong to. 
3246 
3 
Continuous, strong to. 
3246 
2 
Continuous, strong to. 
3246 
1 
Continuous, strong to. 
3246 
