This section is from the book "An Experimental History Of The Materia Medica", by William Lewis.
Lumbricus Terrestris. Vermes terreftres. Earth worms: These insects are suppoted to have a diuretic and an antispafmodic virtue. The faculty of Paris directs them to be prepared for medicinal use, by washing and drying them with a moderate heat. Moistened with wine, or vinous spirits, to prevent their putrefying, and set in a cellar, they are almost wholly resolved in a few days into a slimy liquor, which is said, when mixed with alkaline salts, to yield crystals of nitre.