—, color of, due in part to iodine and bromine, xvii, 170.
—, density at different depths in the Mediterranean, xvii, 364.
—, distillation of, iii, 381.
—, distilled, use of, i, 172.
—, luminousness or phosphorescence of, v, 133; xvii, 209; xviii, 166, 187; xxxv, 372; xxxvi, 208.
—, saltness of ocean, v, 131.
—, —, H. Humphreys, xlix, 208.
—, —, at different depths, xxiii, 10.
—, specific gravity, v, 129.
—, temperature in different parts, v, 129; xxv, 130.