ABSORPTION SPECTRA OF THE ALKALOIDS. 
511 
Solanine. From T. and H. Smith and Co. 
0‘1 grin, in 25 cub. centims. of alcohol of sp. gr. 0’8. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
5 
Strong, continuous to ..... 
2570 
Weak to. 
2265 
4 
Nothing characteristic. 
o 
O 
Nothing characteristic. 
2 
Nothing characteristic. 
1 
Strong, continuous to. 
2265 
A thickness of liquid as great as 20 millims. transmits all rays without selective 
absorption as far as 249, a faint appearance of a line at 256 and at 276 and at 293 
are just sufficiently visible to be recorded. 
Hyoscyamine. From T. and H. Smith and Co. 
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. 
5 
Continuous, strong to. 
2747 
Continuous, faint to. 
2572 
4 
Continuous, strong - to. 
2747 
Continuous, faint to. 
2572 
Continuous, very faint to. 
Continuous, fairly strong to ... 
2436 
3 
2613 
Continuous, weak to. 
2572 
Continuous, faint to. 
2430 
2 
Continuous, strong to. 
2572 
Continuous, weak to. 
2430 
Continuous, faint to. 
2422 
A thickness of 20 millims. absorbs no less refrangible ray than 206'6 = 2747. No 
band distinctly visible. 
3 U 2 
