Anagallis arvensis. (Red chickweed.)
This agent possesses active properties, but has not been studied. It has been extolled in hydrophobia, delirium, mania, epilepsy, etc., which will suggest the line of experiment.
The best preparation, probably, will be a tincture of the recent Chickweed in dilute Alcohol (50°), ℥viij. to the pint; dose quite small—coming within one or two drops.