Le livre des plantes médicinales et vénéneuses de France

DURING the past century the active principles of many medicinal plants have been isolated and identified. This has had the advantage of substituting substances of known composition for somewhat indefinite mixtures, with a corresponding gain in accuracy of dosage and consistency of results. It has sometimes happened that the purified substance has not replicated all the known or suspected effects of the crude drug ; and this is scarcely to be...