... chemical research that the Wild Carrot possesses a particular volatile oil, which promotes copious expectoration for the relief of asthmatic cough; that the Nettle is endowed in its stinging hairs with "formic acid," which avails to arrest bleeding; that Boxwood yields "buxine," a specific stimulant to those nerves of supply which command the hair bulbs; that Goosegrass or Clivers is of astringent benefit in cancer, because of its "tannic," "citric," and "rubichloric ... — Herbal Simples Approved for Modern Uses of Cure • William Thomas Fernie