But perhaps some one will say: 'It is true that there appears to be a happy adjustment of the color of the surface of the earth. It is true that this adjustment has an important influence in diminishing the difference of the temperatures of the polar and equatorial regions, and in rendering them both fit abodes of animals. But then, unhappily for the symmetry of the whole theory, no exception to the general principle is made in favor of the animals themselves. The inhabitants of the torrid zone, and man in a more marked and invariable manner than all the rest, are distinguished by the dark color peculiar to that part of the globe; so that they absorb the heat in an equal degree with, or perhaps greater than, the earth, since its color is even lighter than theirs. We find the same fact to exist as we advance from the equator toward the poles. The covering of the greater part of animals becomes lighter proportionally with the surface of the earth. In the frigid zone, the light color of man as well as of other animals, for instance the white bear, ermine, etc., must necessarily repel from their bodies by reflection a quantity of heat proportional to that which the atmosphere gains by reflection from the snow. This fact strikes us still more forcibly in the temperate zone, where the difference of climate, resulting from change of season, is greater than in any other part of the globe. Here our color is actually darkened by the heat of summer, in proportion to our exposure to it, and becomes lighter at the approach of winter. So that we are rendered by the heat itself more capable of absorbing it, and, consequently, of suffering from it. Surely, we cannot consider these things as evidences of design.' But let us attentively examine these facts, and we shall find that the seeming difficulty disappears, and that the truths which gave rise to it, unite in a symmetrical whole with the others which we have mentioned, to form a cumulative and unanswerable argument in favor of the existence of a benevolent Creator.