—, —, two sometimes mingled, xlii, 114.
—, —, a transference sometimes from the lower to the higher currents, xxxi, 128.
—, —, transfer of volcanic ashes by upper currents, xxv, 129.
—, —, directions to navigators with regard to escaping the violence of, xxv, 119; xxxv, 216.
—, —, in relation to system of ocean currents in the Atlantic, xx, 50; xxv, 130.
—, —, elliptical circuit of storms in the Atlantic, xxv, 114; xxxi, 128.
—, —, Atlantic storms originate in the tropics, xxv, 114.
—, —, the northeasters and southeasters of the United States coast, part of the same storm, xx, 29.
—, —, Pacific system of storms, same as Atlantic, xxxi, 128, 129.
—, —, causes of thunder-storms, gusts, squalls and water-spouts, xxxiii, 56, 58, 60.