Nature has not formed, after our limited manner, perspectives with one or two consonances; but she composes them of a multitude of different progressions to be found in the minutest of her works, of which they constitute the principal charm. They are not the effect of any mechanical law, but have been apportioned to each vegetable, to prolong the enjoyment of its fruit, conformably to the wants of man. Some appear only during the season of heat, others can be preserved; but those designed to supply the accidental demands of mankind remain on the earth at all times.