—, hydrostatic blowpipe, xi, 135.f
—, laboratory of, xix, 26.f
—, laudanum, xii, 291.
—, light, means of producing, ii, 172.
—, lightning rods, xiii, 322.
—, litrameter, xi, 133.f
—, meconic acid, mode of obtaining, xii, 293.
—, matter is heavy as demonstrated by W. Whewell, reply to, xiii, 260.
—, nitrogen, apparatus for obtaining, from the atmosphere, xiv, 356f; xxviii, 263.f
—, nitrous oxide, properties of, xvi, 298.