15.
In the first, “God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament” (i, 7). When moisture was needed “the windows of heaven were opened” and water discharged from the reservoir above. When enough was discharged “the windows of heaven were stopped, and the rain from heaven was restrained” (viii, 2).
In the second, when moisture was needed, “There went up a mist from the earth, and watered the whole face of the ground” (ii, 6).