WE believe, with M. Camille Flammarion, that organized beings exist in all the planets. But are these beings who live in the distant worlds accompanied, like terrestrial man, by a superior type? This is the subject which we now propose to examine. In the absence of observation analogy is our only means of investigation, and, guided by analogy, we must admit that the processes which have taken place upon the earth, since the epoch of its formation, must have similarly taken place upon all the other planets, the earth's congeners. We are now perfectly acquainted with the manner in which the vegetable and animal creations have appeared, and succeeded each other upon our globe since its origin. At first the earth was simply a collection of gas, and burning vapour which revolved round the sun. This mass of gas and vapour grew cold by degrees in its passage through space, and first becoming liquid, afterwards assumed the consistency of paste, and ultimately became solid, by a gradual process of refrigeration. Consolidation began on the surface, because the circumference of a sphere is more exposed than the remainder of the mass to refrigerating influences. Then the water and the vapours which still flowed upon the consolidated globe became condensed, and, falling in burning showers upon the hard soil, they formed the first seas. The proof that the earth's primitive condition was like to a liquid or half paste, is, that if we take a plastic sphere, for instance a slightly fluid ball of quicksilver, and make it turn rapidly upon its axis, we observe that it swells out in the middle, and becomes flat at the two poles, or the extremities of the axis; this is the effect of the centrifugal force engendered by the rotatory motion. Now the earth is depressed at the poles, and slightly swelled out at the equator. The other planets must have been formed by the same process as the earth. They were, no doubt, composed of a collection of gas and vapours, which became liquid, pasty, and eventually solid, by a process of refrigeration. This process, taking effect especially upon their surface, they began to put forth a skin, or exterior and solid covering, which was the soil of the planet. On this resisting soil fell the liquids resulting from the condensation of the water vapour, and thus the first seas of the planets were formed. We would remind those who doubt the correctness of this theory that the poles of the globe of Saturn and that of Jupiter are much more flat than those of the Earth; which is explained by the greater velocity of the rotation of each upon its axis. Our days are 24 hours long, whereas those of Jupiter and Saturn are only 10 hours. Greater rapidity of rotation produces a correspondingly increased depression at the extremities of the axis. This geometrical result demonstrates the justice of the assimilation in their respective origin which we maintain between the Earth and the other planets.