These hypotheses will unquestionably appear bold to those who have not sufficiently meditated on nature, but to the philosophic enquirer they are by no means inconsistent. There may not only have been one general deluge, but even a great number since the existence of our planet; this globe itself may have been a new production in nature; it may not always have occupied the place it does at present. Whatever idea may be adopted on this subject, if it is very certain that, independent of those exterior causes, which are competent to totally change its face, as the impulse of a comet may do, this globe contains within itself, a cause adequate to alter it entirely, since, besides the diurnal and sensible motion of the earth, it has one extremely slow, almost imperceptible, by which every thing must eventually be changed in it: this is the motion from whence depends the _precession_ of the _equinoctial points_, observed by _Hipparchus_ and other mathematicians, now well understood by astronomers; by this motion, the earth must at the end of several thousand years change totally: this motion will at length cause the ocean to occupy that space which at present forms the lands or continents. From this it will be obvious that our globe, as well as all the beings in nature, has a continual disposition to change. This motion was known to the ancients, and was what gave rise to what they called their great year, which the Egyptians fixed at thirty-six thousand five hundred and twenty-five years: the Sabines at thirty-six thousand four hundred and twenty-five, whilst others have extended it to one hundred thousand, some even to seven hundred and fifty-three thousand years. Again, to those general revolutions which our planet has at different times experienced, way he added those that have been partial, such as inundations of the sea, earthquakes, subterraneous conflagrations, which have sometimes had the effect of dispersing particular nations, and to make them forget all those sciences with which they were, before acquainted. It is also probable that the first volcanic fires, having had no previous vent, were more central, and greater in quantity, before they burst the crust of earth; as the sea washed the whole, it must have rapidly sunk down into every opening, where, falling on the boiling lava, it was instantly expanded into steam, producing irresistible explosion: whence it is reasonable to conclude, that the primaeval earthquakes wore more widely extended, and of much greater force, than those which occur in our days. Other vapours may be produced by intense heat, possessing a much greater elasticity, from substances that evaporate, such as mercury, diamonds, &c.; the expansive force of these vapours would be much greater than the steam of water, even at red hot heat consequently they, way have had sufficient energy to raise islands, continents, or even to have detached the moon from the earth; if the