----, chlorine, explosive reaction of hydrogen with, under the sun's rays, xxix, 243.^f ----, ----, apparatus for combustion of metals in, xiv, 354.^f ----, chlorohydric acid, preparation of, from the muriatic acid of commerce, xxxix, 371. ----, cold, apparatus for producing ebullition by, xxxiii, 248.^f ----, collapse of a reservoir, xxxiii, 242.^f ----, cryophorus, improved, xxxiii, 244.^f ----, cyanogen, analysis of, xv, 271.^f ----, deflagrator, galvanic, iv, 201; v, 94.^f ----, ----, ----, improved forms of, and powers, vii, 347^f; xl, 48. ----, deflagrating carburets, phosphurets, &c., in vacuo, mode of, xl, 303.^f ----, De Luc's column, on the construction of, xxv, 136.^f ----, on electricity, vii, 103.^f ----, ----, on some inferences from the phenomena of the spark, in _Thomson's_ work on heat and electricity, xxxii, 278. ----, ----, on the causes of the diversity in the length of sparks erroneously distinguished by the terms positive and negative, xxxii, 275.^f ----, electrical brush, xxxii, 277.^f ----, electric induction, and letters to _Faraday_ on, xxxviii, 1; xli, 1. ----, ---- ----, _M. Faraday_ in reply to, xxxix, 108; xlii, 291. ----, electrical machine, plate, vii, 108^f; (large) xxxii, 272.^f ----, ---- ----, on the error that they must communicate with the earth, xxiv, 253. ----, electrometer, single leaf, vii, 351^f; viii, 99; xxv, 136.^f ----, ----, modification of the single leaf, xxv, 136.^f ----, electrometer, use of, as an electric discriminator, xxv, 136. ----, electro-magnetic and galvanic experiments, viii, 145. ----, ether, hypo-nitro-acetic, xxxv, 329. ----, ----, nitrous, new process for, ii, 326.^f ----, ----, nitric, process for, xxxiii, 241.^f ----, ----, sulphurous, xxxi, 275. ----, etherine, sulphate of, xxxi, 275. ----, eudiometer, a new, ii, 312^f; x, 67^f; xii, 36^f; xxxvii, 383. ----, ----, barometer gage, xxxii, 280.^f ----, ----, subsidiary, xv, 271.^f ----, eudiometry by means of nitric oxide, xv, 260.^f ----, freezing water by aid of sulphuric acid, apparatus for, xxvii, 132.^f ----, fulminating powder, consisting of cyanogen and calcium, process for, xxxvii, 268. ----, ----, silver, injury to, from the explosion of, xxii, 185. ----, galvanic apparatus, new modifications of, iii, 105.^f ----, ----, ignition of gunpowder, xxxvii, 269. ----, galvano-ignition apparatus, xxxii, 282. ----, ----, ibid, see above, under _blasting_. ----, galvanism, new theory of, i, 413.^f ----, ----, series, new, combining the advantages of the trough and deflagrator, xxxii, 265.^f ----, ----, new rotatory multiplier, xxxviii, 339.^f ----, apparatus for regulating the supply of gas by its absorption, xiii, 2.^f ----, gases, a mode of obtaining the specific gravity of, xvi, 293, 295.^f ----, gaseous mixtures, analysis of, xv, 279, 283. ----, gasometers, mode of suspending, iv, 312.^f