Uniting the external decorum of a gentleman with a thorough knowledge of your profession, and with what is still more important, the virtues of a conscientious man and a sincere Christian; ever true to the sound principles of morality which I have endeavored to explain and to inculcate in these lectures: you will be an honor to yourselves, an ornament to your noble profession, the glory and joy of your Alma Mater, a blessing to the community in which Providence will cast your lot as the dispensers of health and happiness and length of days to your fellow-men.
LECTURE VII.
THE NATURE OF INSANITY.
The subject of the present lecture, gentlemen, is “Insanity.”
I. This subject belongs to a course of Medical Jurisprudence, because a physician who treats patients for insanity is liable, from time to time, to be cited before a court of law either as a witness or as an expert. His conduct in such cases is to be guided by the principles of natural and legal justice.
Various important cases at law turn upon the question of a person’s soundness of mind; and frequently the medical expert has it in his power to furnish the court with more reliable information in this matter than any one else. At one time, the validity of a last will may be contested, and the possession of a fortune by one party or another may hinge on the question whether the testator at the time of making his will was in sufficient possession of his mental powers to perform an act of so much consequence.
At another time, interested parties may plead for or against the validity of a sale or other bargain made by a person of doubtful competency of mind; or a life-insurance company may be interested in ascertaining the mental condition of an applicant for membership; or it may be questioned whether the payment of an insurance policy is due to the family of a suicide, the doubt depending for solution on the sound or unsound condition of his mind at the moment of the fatal act. Again, there may be a real or pretended doubt whether a certain property-owner is so far demented as to be unfit to manage his estate; or whether he needs a guardian to take care of his person; or it may even seem necessary to confine him in a lunatic asylum. There may be objections raised to the mental soundness of a witness in a civil or a criminal suit; or, finally, a criminal prosecution will depend mainly on the sanity or insanity of the culprit at the moment when the crime was committed; as was the case with a Prendergast and a Guiteau.
You see, then, gentlemen, that important interests are dependent on the thorough and correct understanding of this matter; and therefore much responsibility rests upon the experts consulted in such cases: property, honor, liberty, nay, even life itself may be at stake.
That cases involving an insane condition of mind must be of frequent occurrence, both in the medical and in the legal professions, is apparent from the large and rapidly increasing amount of lunacy in our modern civilization. Wharton and Stillé’s “Medical Jurisprudence” states (sec. 770, note) that in 1850 there was in Great Britain one lunatic to about one thousand persons; only thirty years later the Lunacy Commission of Great Britain reported one lunatic to 357 persons in England and Wales, that is, nearly three times as many. In New York there is one to 384 persons. It appears certain that its increase of late is out of all proportion to the increase of population; and even though I see reasons to distrust somewhat the figures quoted for England, enough is known to create serious alarm regarding the fruits of modern manners and customs on the minds of thousands. This fact makes the matter of insanity very important for the medical and the legal student.
II. Still it must be noted that the responsibility of deciding cases of lunacy does not rest chiefly with the medical expert. In cases of doubtful insanity the decision is to be given not by the Doctor but by the court of justice. Except on very special occasions, as when a physician is appointed on a committee or commission of inquiry, he appears before a court either as an ordinary witness, stating what facts have fallen under his personal observation; or as an expert, explaining the received opinion of medical men with regard to cases of a certain class. Even though he feels convinced that the culprit or the patient is as mad as a March hare, the physician cannot expect that his statement to that effect will be received as decisive. It is for the judge to instruct the jury what kind or degree of insanity will excuse a culprit from legal punishment, or will disqualify a person from testifying as a witness, or from being a party to a civil contract in certain cases; and it is for the jury to decide whether, in the case in hand, the fact of such insanity exists or not. In criminal cases, the jury pronounces on the double question, whether the accused did the act charged to him, and whether he has been juridically proved to have been accountable for the act under the laws as expounded by the judge.