---- light, transmission of, through metals of different conducting powers, _J. Thomas_, xxxiv, 205.^f ---- ----, daguerrotype experiment by, _B. Silliman, Jr._ and _W. H. Goode_, xliii, 185. ---- multiplier, see _Galvanometer_. ---- music, production of, _C. G. Page_, xxxii, 396; xxxiii, 118. ---- phenomenon, attending the soldering of water pipes in New York city, xvii, 194. ---- protection by the contact of heterogeneous metals, xvi, 263. ---- trough, Watkins's, xvi, 215. Galvanism, anthracite a conductor of, v, 200. ----, carbon fused by, v, 108, 361; vi, 341, 349, 378; viii, 147, 288; x, 109, 119; xxxviii, 190. ----, ---- ----, _L. Vanuxem's_ examination of, viii, 292; x, 102. ----, on colors supposed to be transferred by, through animal substances, _A. Jones_, xxi, 316. ----, _A. Crosse's_ experiments in, see _Crosse_. ----, crystallization of metals by, _G. Bird_, xxxiii, 267. ----, ----, _Becquerel_, xvii, 383. ----, crystals and insects produced by, _A. Crosse_, xxxv, 125.^f ----, engravings copied by, _von Kobell_, xlviii, 221.^f ----, engravings and medals copied by, _T. Spencer_, xl, 157.^f ----, fossils copied by, xlii, 327. ----, gilding by, xli, 402. ----, insects supposed to be produced by, xxxii, 374^f; xxxiii, 272; xxxv, 125.^f ----, ---- ----, _W. H. Weekes_, xliii, 395. ----, grasshopper's legs, a substitute for frogs, _J. W. Bailey_, xxxi, 292.^f ----, insulation of wires, a mode of, proposed, _A. A. Hayes_, xx, 409. ----, metals precipitated by, structure of, _W. de la Rue_, xlix, 390. ----, minerals changed by, _R. W. Fox_, xxxi, 373. ----, results from heat of, and decomposition, _W. Sturgeon_, xxxix, 29. ----, shocks from the calorimotor, how increased, _C. G. Page_, xxxi, 137.^f ----, size of plates, influence of, in, xxvii, 189. ----, theory of, _Prof. Pfaff_, xix, 178. ----, theory of, _R. Hare_, i, 413.^f ----, theory of, _C. F. Schönbein_, xxxviii, 119. Galvanography, _von Kobell_, xlviii, 221.^f ----, _T. Spencer_, xl, 157.^f ----, fossils copied by, xlii, 327. Galvano-ignition apparatus, _R. Hare_, xxxii, 282.^f Galvanometer, _R. Hare's_ improved, xxvi, 359.^f ----, ----, rotary multiplier, xxxviii, 339.^f ----, _J. Henry_, on the application of, to electro-magnetic apparatus, xix, 400.^f ----, _J. Locke_, notice of a new, xxvi, 103^f, 378.^f ----, ----, large thermoscopic, xxxiii, 365. ----, _J. P. Emmet's_, new form of, xxvi, 311. ----, _C. G. Page_, on the use of, xxxii, 354.^f ----, ----, astatic, or rotary, xxxiii, 376.^f ----, ----, axial, xlix, 136.^f ----, _C. G. Page_, circular, xxxv, 259.^f ----, modified, _W. B._ and _H. D. Rogers_, xxvii, 39.^f Galvanoscope, a means of detecting the failure of water in steam boilers by, _C. G. Page_, xxxvi, 141.^f Galvano-magnetic condenser, v, 394. ---- - ---- apparatus, _J. F. Dana_, vi, 330.^f ---- - ---- ----, Italian, v, 388. _Gambey_, notice of, vii, 374.