The Fourteen Weeks' Courses in Natural Science #229539

Astronomy teaches us the probable origin Of our globe. As soon as the crust began to be formed by the mingled action of fire and water, Geology steps in to explain the phenomena. In this vague and nebulous border-land the two sciences meet. From that time we find that the earth entered on a regular series Of progressive revolu tions which gradually fitted it for the introduction of life.