Contains the glucoside digitalin and other active principles.
"Aids to Forensic Medicine and Toxicology" by W. G. Aitchison Robertson
Another plies him with lupuline, camphor, and digitaline.
"Plain Facts for Old and Young" by John Harvey Kellogg
It is better to use digitalin, one one-hundredth of a grain hypodermically, if possible.
"The Home Medical Library, Volume I (of VI)" by Various
The tincture contains a fair proportion of both digitalin and digitoxin.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
Substances containing tannin render the digitalin inert.
"Memoranda on Poisons" by Thomas Hawkes Tanner