. "And we see how, by the south-wind, the air is condensed into thin clouds, in which, as in a looking-glass, are reflected representations at a great distance, of castles, mountains, horses, men, and other things, which when the clouds are gone, presently vanish.--And Aristotle, in his Meteors, shews that a rainbow is conceived in a cloud of the air, as in a looking-glass.--And Albertus says, that t" . . . . .