It is not true that vivisection is necessary to the medical student in order that she may attain the thorough knowledge of human physiology which is needed for the intelligent exercise of the medical profession. Class demonstrations in opening the bodies of the lower animals to examine their organs and tissues are misleading in respect to the action of human organs. The action of the human salivary glands, the action of the cavities of the human heart, the secretion of the gastric juice, etc., can be more correctly realized by careful anatomical study in connection with clinical observation of the effects of healthy and diseased action in the human being, than by any amount of bloody experiment and mutilation of still living cats and dogs. Such demonstration may gratify that instinct of curiosity which always exists in youthful human nature, or it may pander to that craving for excitement which makes the spectacle of a surgical operation so much more attractive to the undeveloped mind than careful clinical study--a tendency which is also seen in gambling, watching executions, bull-fights, etc.--but these are tendencies to be repressed in serious and responsible study, not encouraged. The precious mental activities of the student need to be specially trained into observation of our _human_ faculties in health and in disease. The establishment of a Physiological Laboratory for experimenting on living animals, in a medical school, is not only giving a wrong direction to intellectual activity, but is wasting the valuable time of the student, and diverting the attention of the young practitioner from that careful and intelligent study of the human organism, which alone can lead to practical beneficial results. This practice must therefore be condemned, as giving a false direction to the intellectual faculties of the young. Of the moral danger involved in such methods of study there can be but one opinion by thoughtful and observant persons within the ranks of our Profession.