—, — at great depths, xvii, 295.
—, — ibid, Foster's observations, xvii, 299.
—, — ibid, Irving's observations, xvii, 299.
—, — ibid, Scoresby and Buchan, xlv, 139, 140.
—, —, between New York and Rio, 1834, xxix, 237.
—, saltness of, H. Humphreys xlix, 208.
—, —, remarks on, v, 131.
—, —, at different depths xxiii, 10.
—, pressure of, at great depths, xiv, 194.
—, deep soundings in, by the French ship Venus, xl, 407.