482 
PROFESSOR W. N. HARTLEY ON THE 
Pseud aconitine. From Dr. 0. R A. Wright. Plate 53, fig. 4. 
U’2 grm. in 40 cub. centims. of alcohol of sp. gr. 0’8. 
This solution was diluted to five times its original volume for these photographs. 
Thickness of 
layer of liquid. 
Description of spectrum. 
Wave-lengths. 
millims. 
5 
Continuous, strong to. 
3127 
4 
Continuous, strong to. 
3084 
3 
Continuous, strong to. 
3028 
Absorption band. 
3028 to 2431 
Rays faintly transmitted to where 
spectrum ends at. 
2316 
2 
Continuous to. 
2747 
Absorption band. 
2747 to 2504 
Rays transmitted faintly to ... 
2431 
Rays transmitted weakly to ... . 
2316 
1 
Continuous to. 
2316 
Spectrum ends at a line the position 
of which is just indicated . 
2292 
This substance yielded the same spectrum after it had been kept for two years in 
solution in weak alcohol (proof spirit). 
A series of aconitines from different sources of manufacture was kindly sent to 
me by Dr. Stevenson, Lecturer on Chemistry and Medical Jurisprudence at Guy’s 
Hospital, London. 
The list of specimens, which was accompanied by remarks upon them, is the 
following :— 
No. 1. “Exotic aconitine, probably German, rather inert.” 
No. 2. “ A fine specimen of crystallised aconitine, special, prepared by T. 
Morson and Son, 124, Southampton Ptow, London.” 
No. 3. “Aconitine, from Burgoyne, Burbidges and Co., 16, Coleman Street, 
London.” 
No. 4. “ Nitrate of Aconitine.” (This specimen was accidentally destroyed.) 
No. 5. “ Aconitine of uncertain source.” 
