—, number of, on the earth, x, 383.
— of signs, observations on, S. Akerly, viii, 348.
Lanthanium, a new metal, xxxvii, 192.
—, atomic weight of, xlvii, 190.
Lapham, D., problems relating to canals, xxvii, 127.f
—, plan of the canal locks at Cincinnati, Ohio, xxiv, 70.f
Lapham, D. and I. A., observations on boulders in Ohio, xxii, 300.
Lapham, I. A., statement of elevations in Wisconsin, xlvi, 258.
—, notice of the Louisville and Shippingsport canal, and of the geology of its vicinity, xiv, 65.f
Laplace, P. S., eulogy on, xxv, 1.