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 ----, ----, 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. Electro-chemical action, _G. D. Botto_, xxiv, 197; xxix, 369. ---- - ----, odor, _ozone_ the cause of, _Schönbein_, xli, 43. Electro-dynamic induction of coils, _J. B. Zabriskie_, xxxii, 308.^f ---- - ----, ----, various experiments in, and principles deduced, _J. Henry_, xxxviii, 170, 209.^f ---- - ----, ----, observations on, _J. Henry_, xli, 117.^f ---- - ----, ----, two kinds of, _J. Henry_, xli, 129.^f ---- - ----, ----, theoretical considerations, _J. Henry_, xli, 135.^f Electro-magnet, _Henry's_ large, xix, 408.^f ---- - ----, made for the Laboratory of Yale College, xx, 200. ---- - ----, a variety of, proposed, _J. Humbert_, xxxviii, 205. ---- - ----, _Mr. Ganby's_, xxix, 354. ---- - ----, _C. G. Page's_, xxxv, 253.^f ---- - ----, see farther under _Electro-magnetic apparatus_.