The value of colchicum in joint affections is a tradition of the earliest records of medicine. It shares its curative effects in acute gout with veratria, and, though the active principle of the meadow saffron and the veratrum album are not isomeric, their effects are similar. They constitute the basis of the famous nostrums so extensively patronized by sufferers from gout. Colchicum is the active agent in the eau médicinale de Husson, in Wilson's and Reynolds's specifics, and in the pills of Lartigue and Blair, while veratria is supposed to be that of Laville's remedy. The action of these substances is not understood. The physiological action of colchicum is that of a local irritant and a cardiac depressant of great energy. It purges violently when given in large doses, causes nausea and vomiting, and may produce collapse. In therapeutical doses in a gouty paroxysm it acts as a diuretic and an antipyretic, and allays, sometimes in a most magical manner, the objective and subjective symptoms of the disease. As simple purging by other cathartics does not abort the gouty seizure, the value of colchicum cannot be ascribed to its purging effect, and, besides, purging is by no means necessary to its efficiency. Nor can its utility be ascribed to its diuretic property. There is some question in regard to its claims as a diuretic, and there seems to be no doubt that it often does good where this effect is not observed. Its influence upon the heart does not explain its marvellous action upon the local process, for the same influence obtained by other drugs has no such result. We are driven, therefore, to the conclusion that colchicum has a specific action in gout as certain and as inexplicable as that of quinia in malarial fever, or iodide of potassium in constitutional syphilis. For those who accept the theory that gout is a tropho-neurosis the therapeutical action of colchicum is a strong confirmation of its neurotic origin, for the reasons that colchicum has no influence upon arthritic lesions which are not gouty, and that its physiological effects point to its action on the nervous system.