It is very striking to hear the modern lectures on physiological subjects delivered in every capital in Europe, and to compare the calm and easy manner in which the most astonishing and the most infernal phenomena are described and discussed, with the horror and dismay that the same facts would have created if disclosed by divines in churches three centuries ago. Dr. Maudsley, in his recent work on "The Physiology and Pathology of Mind," and other physicians occupied in his line of practice, lead us through the lunatic asylums of every country, pointing out as ordinary or extraordinary incidents the same "afflictions" of children and other morbid persons which we read of, one after another, in the Salem story. It is a matter of course with such practitioners and authors to anticipate such phenomena when they have detected the morbid conditions which generate them. Mr. Upham himself is evidently very far indeed from understanding or suspecting how much light is thrown on the darkest part of his subject by physiological researches carried on to the hour when he laid down his pen. His view is confined almost exclusively to the theory of fraud and falsehood, as affording the true key. It is not probable that anybody disputes or doubts the existence of guilt and folly in many or all of the agents concerned. There was an antecedent probability of both in regard to Mr. Parris' slaves, and to such of the young children as they most influenced; and that kind of infection is apt to spread. Moreover, experience shows us that the special excitement of that nervous condition induces moral vagaries at least as powerfully as mental delusions. In the state of temper existing among the inhabitants of the Village when the mischievous club of girls was formed at the pastor's house, it was inevitable that, if magic was entered upon at all, it would be malignant magic. Whatever Mr. Upham has said in illustration of that aspect of the case his readers will readily agree to. But there is a good deal more, even of the imperfect notices that remain after the abstraction and destruction of the records in the shame and anguish that ensued, which we, in our new dawn of science, can perceive to be an affair of the bodily organization. We are, therefore, obliged to him for rescuing this tremendous chapter of history from oblivion, and for the security in which he has placed the materials of evidence. In another generation the science of the human frame may have advanced far enough to elucidate some of the Salem mysteries, together with some obscure facts in all countries, which can not be denied, while as yet they can not be understood. When that time comes, a fearful weight of imputation will be removed from the name and fame of many agents and sufferers who have been the subjects of strange maladies and strange faculties, in all times and countries. As we are now taught the new discoveries of the several nerve-centers, and the powers which are appropriated to them;