"Long confined to simple appearances, they saw nothing in the movement of the stars but an unknown play of luminous bodies rolling round the earth, which they believed the central point of all the spheres; but as soon as they discovered the rotundity of our planet, the consequences of this first fact led them to new considerations; and from induction to induction they rose to the highest conceptions in astronomy and physics. "Indeed, after having conceived this luminous idea, that the terrestrial globe is a little circle inscribed in the greater circle of the heavens, the theory of concentric circles came naturally into their hypothesis, to determine the unknown circle of the terrestrial globe by certain known portions of the celestial circle; and the measurement of one or more degrees of the meridian gave with precision the whole circumference. Then, taking for a compass the known diameter of the earth, some fortunate genius applied it with a bold hand to the boundless orbits of the heavens; and man, the inhabitant of a grain of sand, embracing the infinite distances of the stars, launches into the immensity of space and the eternity of time: there he is presented with a new order of the universe of which the atom-globe which he inhabited appeared no longer to be the centre; this important post was reserved to the enormous mass of the sun; and that body became the flaming pivot of eight surrounding spheres, whose movements were henceforth subjected to precise calculations. "It was indeed a great effort for the human mind to have undertaken to determine the disposition and order of the great engines of nature; but not content with this first effort, it still endeavored to develop the mechanism, and discover the origin and the instinctive principle. Hence, engaged in the abstract and metaphysical nature of motion and its first cause, of the inherent or incidental properties of matter, its successive forms and its extension, that is to say, of time and space unbounded, the physical theologians lost themselves in a chaos of subtile reasoning and scholastic controversy.* * Consult the Ancient Astronomy of M. Bailly, and you will find our assertions respecting the knowledge of the priests amply proved.