“Here, in the schools which are soon to be opened, within the walls of this institution which we are preparing to establish in this wood, and the corner stone of which has just been laid, the masters of this newly ordained science will teach our sons to regard some of the commonest things as the most important agents in the physical economy of our planet. They are also mighty ministers of the Creator. Take this water” (holding up a glassful) “and ask the student of physical geography to explain a portion only of its multitudinous offices in helping to make the earth fit for man’s habitation. He may recognize in it a drop of the very same which watered the Garden of Eden when Adam was there. Escaping thence through the veins of the earth into the rivers, it reached the sea; passing along its channels of circulation, it was conveyed far away by its currents to those springs in the ocean which feed the winds with vapor for rains among these mountains; taking up the heat in these southern climes, where otherwise it would become excessive, it bottles it away in its own little vesicles. These are invisible; but rendering the heat latent and innocuous, they pass like sightless couriers of the air through their appointed channels, and arrive here in the upper sky. This mountain draws the heat from them; they are formed into clouds and condensed into rain, which, coming to the earth, make it ‘soft with showers’, causing the trees of the field to clap their hands, the valleys to shout, and the mountains to sing. Thus the earth is made to yield her increase, and the heart of man is glad. “Nor does the office of this cup of water in the physical economy end here. It has brought heat from the sea in the southern hemisphere to be set free here for the regulation of our climates; it has ministered to the green plants, and given meat and drink to man and beast. It has now to cater among the rocks for the fish and insects of the sea. Eating away your mountains, it fills up the valleys, and then, loaded with lime and salts of various minerals, it goes singing and dancing and leaping back to the sea, owning man by the way as a task-master—turning mills, driving machinery, transporting merchandise for him—and finally reaching the ocean. It there joins the currents to be conveyed to its appointed place, which it never fails to reach in due time, with food in due quantities for the inhabitants of the deep, and with materials of the right kind to be elaborated in the workshops of the sea into pearls, corals, and islands—all for man’s use. “Thus the right-minded student of this science is brought to recognize in the dewdrop the materials of which He who ‘walketh upon the wings of the wind’ maketh His chariot. He also discovers in the raindrop a clue by which the Christian philosopher may be conducted into the very chambers from which the hills are watered.