Jewelry, composition of the powder used in giving the fine color to gold, xii, 188.
_Johnson, E. F._, canal surveys in the state of New York, xxiv, 19.^f ----, on the height of the mountains of New York, xxxvii, 84. ----, on the present mode of conducting land surveys in the U. States, xix, 131. ----, on the epicycloid, xxi, 280.^f
_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. ----, on the coal field of Carbon creek, xxxix, 137. ----, iron spikes, experiments on the adhesion of, in different kinds of timber, xxxii, 34.^f ----, rotascope, description of, xxi, 265.^f ----, rotation of liquids of different specific gravities, placed upon each other, xxvii, 84.^f ----, on the rapid production of steam in contact with metals highly heated, xix, 292; xx, 308, 418. ----, action between water and hot iron, xxi, 71.^f ----, description of a steam pyrometer, xxii, 96.^f ----, the strength of cylindrical steam boilers, xxiii, 68. ----, notice of an ancient American utensil, xxiii, 65.^f
_Johnston, J._, improved air pump, xxxiv, 86.^f ----, apparatus for solidifying carbonic acid, xxxviii, 297^f; xlii, 203. ----, new crystals of beryl, from Middlelown, xl, 401.^f ----, on a large crystal of columbite from Middletown, Ct., xxx, 387.^f ----, sketch of the early history of Count Rumford, xxxiii, 21. ----, on shrinkage marks in sandstone, xlv, 315.
_Johnston, J. F. W._, blank form for statistical information on chemical education, xxxi, 414. ----, work by, on agriculture, noticed, xlii, 187.
Joints in rocks, _W. W. Mather_, xli, 172.
_Jones, A._, steamboats protected from lightning, xxii, 106. ----, on hail storms, xxiii, 35.^f