The last mystery of Life is Death. Such is the economy of living beings, that the very actions which are subservient to their preservation, tend to exhaust and destroy them. Each being has its definite term of life, and on attaining its acme of perfection, it begins to decay, and at length ceases to exist. This is alike true of the insect which perishes within the hour, and of the octogenarian who falls in a ripe old age. Love provides for the perpetuation of the species. “We love,” says Virey, “because we do not live forever: we purchase love at the expense of our life.” To die, is as characteristic of organized beings as to live. The one condition is necessary to the other. Death is the last of life’s functions. And no sooner has the mysterious principle of vitality departed, than the laws of matter assert their power over the organized frame. “Universal experience teaches us,” says Liebig, “that all organized beings, after death, suffer a change, in consequence of which their bodies gradually vanish from the surface of the earth. The mightiest tree, after it is cut down, disappears, with the exception, perhaps of the bark, when exposed to the action of the air for thirty or forty years. Leaves, young twigs, the straw which is added to the soil as manure, juicy fruits, &c., disappear much more quickly. In a still shorter time, animal matters lose their cohesion; they are dissipated into the air, leaving only the mineral elements which they had derived from the soil. “This grand natural process of the dissolution of all compounds formed in living organizations, begins immediately after death, when the manifold causes no longer act under the influence of which they were produced. The compounds formed in the bodies of animals and of plants, undergo, in the air, and with the aid of moisture, a series of changes, the last of which are, the conversion of their carbon into carbonic acid, of their hydrogen into water, of their nitrogen into ammonia, of their sulphur into sulphuric acid. Thus their elements resume the forms in which they can again serve as food to a new generation of plants and animals. Those elements which had been derived from the atmosphere take the gaseous form and return to the air; those which the earth had yielded, return to the soil. Death, followed by the dissolution of the dead generation, is the source of life for a new one. The same atom of carbon which, as a constituent of a muscular fibre in the heart of a man, assists to propel the blood through his frame, was perhaps a constituent of the heart of one of his ancestors; and any atom of nitrogen in our brain has perhaps been a part of the brain of an Egyptian or of a negro. As the intellect of the men of this generation draws the food required for its development and cultivation from the products of the intellectual activity of former times, so may the constituents or elements of the bodies of a former generation pass into, and become parts of our own frames.”