Ritter, T., on Belmont anthracite, xii, 301.
Rive, A. de la, galvanic instrument by, v, 395.
—, present state (1833) of the principles of electricity, xxvi, 175.
—, on electro-magnetic currents, xxxiv, 6.
River McKenzie, xvii, 4.
— Rhine, amount of water in, which passes Bâle, v, 392.
— Mississippi, velocity of, vii, 174.
— Copper Mine, xvii, 7.
Rivers, action of, xxi, 23.
Rivero, de, sketch of the mines of Pasco, xvii, 43.f