Hayes, G. E., geology of western New York, with remarks on the causes of its topographical features, xxxi, 241; xxxv, 86.f
Hayes, J. L., on the geographical distribution and phenomena of volcanoes, xlvii, 127.
—, influence of icebergs upon drift, xlv, 316, 326.
Haymond, R., on remains of Megatherium and Mastodon, xlvi, 294.
Hazard, R. G., method of describing a hyperbola, xxi, 314.f
[Heat,] absorption of, Nobili and Melloni on, xxiii, 188.
—, —, apparatus for illustrating, A. D. Bache, xxviii, 320.f
—, animal, vii, 200.
—, —, influence of the nerves on, x, 390.
—, —, Nobili and Melloni's experiments on insects, &c., xxiii, 185.