The power of mind over the body is illustrated by the annals of explorers in the frigid zone, and in the deadly regions of the tropics. The leaders of such expeditions, with all the burden and responsibilities of their position, bear up better than their men, and rarely succumb to adversities to which the latter yield. The hardships met by Dr. Kane and Lieut. Greely are fresh in the mind; and the invincible Stanley, braving the savage foes and deadly malaria of the Black Continent, is another example. Such leaders, encouraged by the honors success will yield, and dreading the shame of defeat more than death, persevere against all opposing forces, while their men, with less at stake either to win or lose, sink, apathetically, before reaching the goal. In such cases, the will sustains the body, and shows its independence of the material forces which affect it. In no instance is the control of mind over the sensations, affecting it through the body, shown with greater force than in the terrible ordeals of martyrdom. The weak and delicate woman, as well as the strong man, was bound on the rack, or subjected to the unspeakable horrors of the thumbscrew, burning pincers, or the smouldering fagots, and yet so far from uttering moans or sighs, smiled on their tormentors, or sang hozannas amid the flames. Their minds had risen to such exaltation that physical pain was unfelt, in fact, was a relief to the mental tension. There is no pathological phenomena more freely attested than the sudden vitiation of the secretions by intense mental disturbances. A mother subjected to intense fright, or fear, will have her milk become poisonous to her babe. Dr. A. Combe mentions an instance where a mother left her child to assist the father in combat with a drunken soldier. After the fight was over she nursed the babe, which was strong and healthy. After a few minutes it ceased nursing, and sank dead in its mother’s arms. The milk had become a virulent poison. A lady with a violent temper was warned by her physician against indulging it while nursing her babe, and she had obeyed until the child was several months old, strong and healthy. At that time she became enraged at some trivial circumstance, and soon afterwards she nursed her babe, which became ill, and within an hour was dead. The changes wrought in the saliva by anger are well known. The bite of an enraged man is as much to be dreaded as that of a mad dog. Blood poisoning is almost a sure consequence of inoculation with the saliva of an angry man or brute. Hydrophobia itself is probably a spontaneous production in canines subjected to starvation and ill-usage.