Johnson, S. L., ascent of Mt. Etna, xxvi, 1.
Johnson, W. R., economy of fuel, in its domestic applications, xxiii, 318.f
—, electricity, experiments in, xxv, 57.
—, heating power of various coals, xlix, 166, 310.
—, heat and vapor, inquiries respecting, xxi, 304.
—, method of determining and calculating the specific heats of certain solids, xxvii, 267.
—, huaco a remedy for hydrophobia, xxiv, 279, 388.
—, confirmatory notice of the medical virtues of guaco, xxvii, 171.
—, iron from the Adirondack iron works, experiments on two varieties, xxxvi, 94.f
—, iron ore and coal of Pennsylvania, analyses of, xxxviii, 382.