The science of Medicine is progressive; genius irradiates its onward march. Few other sciences have advanced as rapidly as it has done within the last half century. Hence it has happened that in many of its branches text-books have not kept pace with the knowledge of its leading minds. Such is confessedly the case in the department of Medical Jurisprudence. This very term, Medical Jurisprudence, as now used in colleges, is generally acknowledged to be a misnomer. There is no reason why it should be so used. The leading medical writers and practitioners are sound at present on the moral principles that ought to direct the conduct of physicians. It is high time that their principles be more generally and distinctly inculcated on the younger members, and especially on the students of their noble profession. To promote this object is the purpose aimed at by the author. His brief volume is not intended to be substituted for existing text-books on Medical Jurisprudence, but to supply some chapters imperatively demanded by science for the thorough treatment of this important subject.