As to your practice, if a gentleman walks into my rooms smelling of iodoform, with a black mark of nitrate of silver upon his right forefinger, and a bulge on the right side of his top-hat to show where he has secreted his stethoscope, I must be dull, indeed, if I do not pronounce him to be an active member of the medical profession.
Arthur Conan Doyle. The Adventures of Sherlock Holmes. A Scandal in Bohemia
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The family doctor gave her cod liver oil, then iron, then nitrate of silver, but as the first and the second and the third were alike in doing no good, and as his advice when spring came was to go abroad, a celebrated physician was called in.