"The earth does move, notwithstanding," whispered Galileo, leaving the dungeon of the Inquisition: by which he meant his friends to understand, that if the earth did move, the fact would remain so in spite of his punishment. But a less orthodox assembly than the conclave of Cardinals might have been staggered by the novelty of the new philosophy. According to Laplace, the apparent diurnal phenomena of the heavens would be the same either from the revolution of the sun or the earth; and more than one reason made strongly in favor of the prevalent opinion that the earth, not the sun, was stationary. First, it was most agreeable to the impression of the senses; and next, to disbelieve in the fixity of the solid globe, was not only to eject from its pride of place our little planet, but to disturb the long-cherished sentiment that we ourselves are the centre--the be-all and end-all of the universe. However, the truth will out; and this is its great distinction from error, that while every new discovery adds to its strength, falsehood is weakened and at last driven from the field. That the earth revolves round the sun, and rotates on its polar axis, have long been the settled canons of our system. But the rotation of the earth has been rendered _visible_ by a practical demonstration, which has drawn much attention in Paris and London, and is beginning to excite interest in this country. The inventor is M. Foucault; and the following description has been given of the mode of proof: