In the same chapter are brought forward numerous instances of delirium produced by toxic agents. Among these is a striking case of mania in a patient—the subject of syphilis— in whom, at an apparently hopeless stage, a cure was effected by iodide of potassium; and there are several cases of delirium in rheumatic fever, in connection with which the essentially neurotic character of this affection is affirmed. Other varieties of delirium considered are febrile and postfebrile, epileptic, traumatic, and puerperal; in the last, a nutritive or even stimulant treatment is decidedly recommended. The treatment of delirium is fully considered; blood-letting, general or local, is admitted to have value in certain cases; the cold douche, combined with the warm bath, is reported as exceedingly well worth trial; tartar emetic, with opium, is affirmed to be useful, but as contra-indicated by a weak heart; the use of hydrocyanic acid has a similar caution attached to its recommendation.