Of all Surfaces, there is none whose Genuine Colour is harder to be discern'd, than those which are bright and polish'd: This is observable, in some Herbs, and in the Leaves of some Trees, whose Surfaces being smooth and shining, assume that Colour, which the Sun's Reflex casts upon them; or, at least, that of the Air, which illumines them: Insomuch, that in those parts, where these Reflex's strike, the Real Colour is but little seen.