the case of others, on the contrary, the differences of the centre produce the changes which we observe. Besides, to assign one single cause to all these phænomena, when the experience of our senses suggests us several, is folly. It is the conduct of ignorant astronomers covetous of a vain knowledge, who, assigning imaginary causes to facts, wish to leave wholly to the Deity the care of the government of the universe.
“Some stars appear to be left behind by others in their progress; this arises either from the fact of their having a slower motion, though traversing the same circle; or, because, though they are drawn on by the same propelling power, they have, nevertheless, a movement proper to themselves in a contrary direction; or it may be caused by the fact that, though all are placed in the same sphere of movement, still some have more space to traverse, and others less. To give one uniform and positive explanation of all these facts, is not consistent with the conduct of any people but those who love to flash prodigies in the eyes of the multitude.
“Falling stars may be particles detached from the stars, or fragments resulting from their collision; they may also be produced by the fall of substances which are set on fire by the action of the wind; by the re-union of inflammable atoms which are made to come together so as to produce this effect by a sort of reciprocal attraction; or else by the movement which is produced in consequence of the re-union of atoms in the very place where they meet. It may also happen that the light vapours re-unite and become condensed under the form of clouds, that they then take fire in consequence of their rotatory motion, and that, bursting the obstacles which surround them, they proceed towards the places whither the force by which they are animated drags them. In short, this phænomenon also may admit of a great number of explanations.
“The presages which are drawn from certain animals arise