ADJ.
cold
ARSENICAL + NOUN
water
PREP.
with
adj
Of or pertaining to, or containing, arsenic.
Radio-active baths are said to act favourably in a sexual direction. So too with arsenical springs, cold water treatment, and hydrotherapy.
noun
Any drug or other substance containing arsenic.
Thus Mercury cures the holes which it has provoked and other Arsenicals do likewise.