_On the Movements of the Heart_.--In a recent memoir Dr. Sibson describes his experiments on the movements of the heart, which were made on the ass under the influence of wourali, and on dogs subjected to chloroform. He found that the contraction of the ventricles takes please in every direction toward a region of rest, which in the right ventricle corresponds with the anterior papillary muscle in the left ventricle, with a situation about midway between apex and base. Simultaneously with the universal contraction of the ventricles there is universal distention of both auricles, the pulmonary artery, and the aortae. The total amount of blood contained in the heart and great vessels is the same during both systole and diastole. During the ventricular contraction, however, the distribution of the blood, lessened toward the region of the apex, balances itself by being increased in that of the base, since the auricles and great vessels are enlarged, not only toward the ventricles, but also outward and upward. During ventricular dilatation the reverse takes place. {141} _The Physics of a Meteorite_.-In a recent note in the proceedings of the Royal Society, the Rev. Samuel Haughton, of Trinity College, Dublin, gives a very graphic account of the fall of an aërolite. The fire-ball was seen by two peasants, who have given the following written statement of their observations; and since the facts described by these ignorant men correspond exactly with the facts theoretically believed to present themselves, we think the description of the highest interest. It is headed, The Statement of Eye-witnesses, and runs as follows: "I, John Johnson, of the parish of Clonoulty, near Cashel, Tipperary, was walking across my potato-garden at the back of my house, in company with Michael Falvy and William Furlong, on August 12, 1865, at 7 P.M., when I heard a clap, like the shot out of a cannon, very quick and not like thunder; this was followed by a buzzing noise, which continued for about a quarter of an hour, when it came over our heads, and, looking up, we saw an object falling down in a slanting direction; we were frightened at the speed, which was so great that we could scarcely notice it; but after it fell we proceeded to look for it, and found it at a distance of forty yards, half buried in the ground, where it had struck the top of a potato-drill. We were some time looking for it (a longer time than that during which we heard the noise). On taking up the stone we found it warm (milk warm), but not enough to be inconvenient. The next day it was given up to Lord Hawarden."--_Popular Science Review_.