—, views on granite, xxxiii, 116.
—, probable age of graphite and anthracite in the mica slate at Worcester, Mass., xlvii, 214.
—, geological position of the mastodon at Big Bone Lick, Ky., and elsewhere, xlvi, 320.
—, geology of, 4th edition, notice of, xxix, 358.
—, proposed visit to the United States, xli, 403; xlii, 213.
Lyon, L., on surveying instruments, xiv, 268.f
M.
Macaire, vegetable physiology in relation to rotation of crops, xxiii, 138.
—, injurious action of gases on vegetation, xxiii, 193.
—, on nitrogen in animal substances, xxiii, 384.