ABSORPTION SPECTRA OF THE ALKALOIDS. 
477 
Alkaloids of Strychnos. 
Brucine.C 23 H 26 N 2 0 4 .4H 2 0 
Strychnine.C 21 H 22 N 2 0 2 
Alkaloids of Yeratrinm. 
Veratrine.C 37 H 53 NO n (Couerbe’s Yeratrine) 
Cevadine.C 32 H 40 NO 9 (Merck’s Yeratrine) 
Various other Alkaloids. 
Digitaline.C 54 H 45 O 30 , a glucoside 
Hyoscyamine.C 17 H 23 N0 3 
Caffeine.C 8 H 10 N 4 O 2 .H 2 O 
Piperine.C 17 H 19 N0 3 
Picrotoxine ; composition doubtful. 
Index. 
The specimens of alkaloids and their derivatives, the strength of the solutions 
examined, the solvents employed, the sources whence the alkaloids were obtained, or 
by whom they were prepared, are given in the following tabular statement. 
Double normal sulphuric acid signifies a gramme molecule of H 3 S0 4 in a litre of 
liquid, or 
h 2 so, 
1000 ■ 
Name. 
Proximate strength 
of solutions. 
Solvent. 
From whom obtained. 
Page. 
Aconitine, Plate 53, fig. 1 . . 
1 1 
200 ) 1000 * 
Alcohol, sp. gr. 0'8 
Dr. C. R. A. Weight 
479 
Aconitine, Plate 53 ... 
1 
2 0 0 . 
Proof spirit . . . 
Dr. Stevenson 
479 
Aconitine, Plate 53, fig. 2 . 
1 1 
2 0 0 ? 1 0 0 0 * 
Alcohol, sp. gr. 0 - 8 
T. and H. Smith and Co. 
480 
Aconitine (foreign), Plate 53. 
1 
2 0 0 . 
” 99 
99 ’5 
481 
Japaconitine, Plate 53, fig. 3 . 
1 1 
2 005 1 000 * 
” ” 
Dr. C. R. A. Weight 
481 
Pseudaconitine (4),PI. 53, fig.4 
1 1 
2 0 0 5 1 0 0 0 * 
99 ’ 9 
9 9 99 
482 
Aconitine . 
111 
20 0 ’ 100 0 ’ 5000 * 
9 9 9 9 
Dr. Stevenson 
483 
| Morson’s aconitine (5), 
Plate 53, fig. 5 
111 
2 00 ’ 1 000 ’ 5 000 * 
9 9 9 9 
99 
484 
Aconitine (6), Plate 53, fig. 6 
111 
20 0 ’ 100 0 ’ 5000 * 
9 9 9 9 
99 
485 
Aconitine . 
1 1 
2 0 0 ’ 1 0 0 0 ’ 
” ” 
,, 
486 
Quinine, Plate 53, fig. 7 . . 
1 
10 0 0 
99 99 
Mr. David Howard 
487 
Quinine sulphate, Plate 54 . 
Cinchonine, Plate 54 . . . 
12 5 0 
1 
12 5 0 
Alcohol, sp. gr. 0'8, 
with £ volume of 
9 9 *.9 
9 9 99 
487 
488 
Quinidine sulphate, Plate 54 . 
i 
12 5 0 
r 
h 2 so 4 
99 99 
488 
Cinchonidine sulphate, PI. 54 
i 
1250 * * ‘ 
1000 
99 ” 
489 
MDCCCLXXXV. 3 Q 
