Chapter D (1)

_Daggett, H._, on the cutting of steel by soft iron, vi, 336.

Daguerrotype process, _Daguerre's_, xxxvii, 374; xxxviii, 97. ---- ----, improvement in, _F. A. P. Barnard_, xli, 352. ---- ---- and its applications, _W. H. Goode_, xl, 137. ---- experiment by galvanic light, _B. Silliman, Jr._ and _W. H. Goode_, xliii, 185. ---- pictures, mode of fixing, engraving, and printing from, _Dr. Berres_, xxxix, 385. ----, see farther under _Photography_.

Dahlias, notes concerning, xxiv, 208.

Daltonism, remarks on, _Prof. Wartmann_, xlii, 162.

_Dalyell, J. G._, on the propagation of Scottish Zoophytes, xxviii, 77.

Dams, vibrating, account of, _E. Loomis_, xlv, 363.^f ----, time of vibration calculated from the dimensions of, xlv, 373.

Damascus cutlery, v, 182.

_Dana, J. D._, description of the Argulus Catostomi, xxxi, 297.^f ----, ---- of the Caligus Americanus, xxxiv, 225.^f ----, ---- of two species of Hydrachna, xxx, 354.^f ----, metamorphosis of Anatifæ, and their relation to Crustacea, xlv, 335. ----, classification of minerals, xlvi, 374. ----, drawing of figures of crystals, xxxiii, 30.^f ----, crystallographic symbols, xxviii, 250. ----, on the formation of twin crystals, xxx, 275.^f ----, crystallization of the so-called Edwardsite, (monazite,) xxxiii, 202.^f ----, crystals of quartz, magnetic iron, apatite, and calc spar, distorted, xlvi, 365.^f ----, ---- pyrites, Rossie, xlvi, 36.^f ----, ---- datholite, xlvi, 380.^f ----, ---- zircon, tesselated, xlvi, 36.^f ----, eremite identical with monazite, xlv, 402.^f ----, Torrelite identical with Columbite, xxxii, 149.^f ----, measurement of Lederite, showing its identity with sphene, xlviii, 180. ----, minerals in crystallized limestones, produced by heat acting on constituents and impurities of non-crystallized limestones, xlvii, 135. ----, origin of the constituent and adventitious minerals of trap rocks, xlix, 49. ----, ---- of boracic acid in native borates, xlix, 61. ----, ---- of mountains, xlv, 128. ----, ---- of serpentine, xlv, 120. ----, ---- of zeolites, xlv, 116. ----, observations on pseudomorphism, xlviii, 81, 397. ----, on the analogies between modern igneous rocks, and the so-called primary formations, xlv, 104. ----, schistose structure due to state of crystallization of constituents, xlv, 105. ----, temperature limiting the distribution of corals, xlv, 130, 310. ----, areas of subsidence in the Pacific, indicated by the distribution of coral islands, xlv, 131^f, 310. ----, notice of Vesuvius, in 1834, xxvii, 281. ----, withdrawal of a charge against _J. P. Couthouy_, xlvii, 122. ----, reply to _Mr. Couthouy_, xlvi, 129. ----, System of Mineralogy by, reviewed, xlvi, 362.^f

_Dana, J. F._, on arsenical cobalt, and the modes of detecting cobalt, viii, 301. ----, on cantharadin in the Lytta vittata, or potato fly, ii, 137. ----, chemical examination of some morbid animal products, iv, 149. ----, on the connexion of heat, electricity and magnetism, vi, 163.^f ----, concretion from the tonsil, vi, 165. ----, electrical battery, i, 292.^f ----, preparation of euchlorine, vi, 164. ----, galvano-magnetic apparatus by, vi, 330.^f ----, theory of the action of nitrous gas in eudiometry, vii, 338. ----, effect of vapor on flame, i, 401. ----, on the wax of the Myrica cerifera, i, 294.

_Dana, S. L._, analyses of coprolites, xlviii, 46. ----, on the indigo of commerce, xlii, 320.

Danaite, analysis of, _A. A. Hayes_, xxiv, 386. ----, identical with mispickel, xlvi, 384.^f

Danburite, analysis of, _C. U. Shepard_, xxxv, 137.

_Darlington, W._, pluviometrical observations at Westchester, Penn., vi, 326. ----, note on Cardamine rotundifolia, xviii, 356. ----, importance of the grasses to man, xli, 365.

_Darling, N._, hurricane in New England, Sept., 1815, xlii, 243.

Datholite, crystal from Roaring Brook, Ct., _J. D. Dana_, xlvi, 380.^f ----, in Connecticut, xxii, 389; xlvi, 380.^f ----, in New Jersey, ii, 191, 369; v, 400; xl, 69; xliv, 58. ----, in New York, xliv, 58.

_Daubeny, C._, on the climate of N. America, xxxv, 288. ----, disintegration of the dolomites of the Tyrol, xlii, 321. ----, remarks on iodine and bromine in mineral waters, xxi, 366. ----, geology of N. America, xli, 195. ----, on the thermal springs of N. America, xxxvi, 88. ----, quantity of salt in seawater, xxxvi, 188. ----, on manures as stimulants to vegetation, xlii, 319. ----, effect of arsenic on vegetation, xxxi, 346.

_Daubuisson's_ Elements of Geology announced, ii, 166.

_Davenport's_ rotating electro-magnetic machine, xxxii, appendix after 216. ----, electro-magnetic machine, xxxiii, 193.

_Davies, C._, demonstration of a problem in conic sections, vi, 280.^f

_Davyne_, analysis and figure of, xi, 255.^f

Day, possible variation in the length of, _W. W. Mather_, xlvi, 344.

_Day, G. E._, on the restoration of the deaf and dumb to hearing,
xxx, 301.

Dead animals, means of employing, _M. Payen_, xxiv, 326. ----, bodies, preservation of, i, 307. ----, Sea, observations on, ix, 349. ----, ----, level of, xl, 213. ----, ----, barometrical observations made to determine the level of, xlii, 214. ----, ----, account of, _J. D. Sherwood_, xlviii, 1. ----, ----, analysis of waters of, xiii, 395; _B. Silliman, Jr._, xlviii, 10.

Deaf and dumb, observations on the language of signs for, by
_S. Akerly_, viii, 348.

Deafness, cure of, ix, 204; xxx, 301.

_Deane, J._, auroral arch in Vermont, xxxv, 380. ----, fossil footmarks of Turner's falls, Mass., xlvi, 73.^f ----, ---- ---- the ornithichnites of the Connecticut river sandstone, xlv, 178. ----, ---- ---- in the Connecticut valley, xlvii, 381; xlviii, 158^f; xlix, 213.^f ----, ---- ----, reply to _E. Hitchcock_, xlvii, 399. ----, ---- and rain drops, xlix, 213.^f ----, ---- ----, new species of Batrachian, xlix, 79.^f

_Dearborn, H. A. S._, on the changes of level in the North American
lakes, xvi, 78.^f

Deaths, monthly, among infants in France, xix, 192. ----, statistics of, among the white troops in the West Indies, xxxvii, 196. ----, see _Obituary_.

_De Candolle, A. P._, biographical notice of, _G. B. Emerson_, xlii, 217. ----, anecdote of, iv, 388. ----, Species Plantarum announced, i, 435.

Deccan, geology, &c. of, xxxiii, 274.

Decomposition of vegetable and animal substances, most favorable
circumstances for, xv, 182.

Decrepitation, cause of, _M. Baudrimont_, xxxi, 162.

Definitions, remarks on, _D. Wilkie_, xxx, 28, 266; xxxi, 88, 236.

Deflagrator, Hare's, iii, 105^f; iv, 201; v, 94.^f ----, and calorimotor, their relations to one another, and to other galvanic instruments, vi, 337. ----, its improved forms, deflagrating power, anomalous polarity, _R. Hare_, vii, 347^f; viii, 99; ix, 181. ----, galvanic, _R. Hare_, xl, 48. ----, improved form of, _M. Faraday_, xxxii, 170.

Degradation of greenstone in the Connecticut valley, vi, 55.

---- in western New York, _G. E. Hayes_, xxxv, 88.

_De la Beche, H. T._, rocks of Europe, classification of, xviii, 26.

_De Lalande_, notice of, iv, 381. ----, prizes founded by, xxv, 190.

_De la Rive, A._, galvanic instrument by, v, 395. ----, and _Macaire_, experiments on muriatic acid, xi, 393. ----, present state (1833) of the principles in electricity, xxvi, 175. ----, on electro-magnetic currents, xxxiv, 6.

_De la Rue, W._, structure of electro-precipitated metals, xlix, 390.

Delirium, Dwight's cases of, i, 431.

_Del Rio, A._, in reply to _Prof. Shepard_, xxx, 384. ----, reply of _Prof. Shepard_ to, xxxi, 131.

De Luc's column, on the construction of, _R. Hare_, xxv, 136.^f

_De Kay, J. E._, on the Pennatula sagitta of Lamarck, iv, 87.^f ----, on the supposed transportation of rocks, xiii, 348. ----, report on the bones of Big Bone Lick, xx, 370. ----, report on the fishes of New York, notice of, _D. H. Storer_, xlv, 275.

Denderah, zodiac of, removed to France, v, 191; vi, 200.

_Dent, E. J._, a portable mercurial pendulum, xxxv, 289. ----, on the errors of chronometers and on a new compensation-balance, xlv, 83.^f

Denudation by Long Lake and Mud Lake, Vt., xi, 39.^f

_Descartes_, theory of, xxxiii, 3. ----, head, presented to the French Institute, iv, 390.

Deserts, origin of, _W. C. Redfield_, xxv, 134; xxxiii, 261.

_Desfontaines_, life and writings of, xxvii, 201.

_Deshayes_, Tertiary Fossils, _Cuvier_ and _Brongniart's_ report on,
xxiii, 196.

_Desmarest, A. G._, notice of, xxxvii, 124.

_Despretz, C._, on crystallizable acetic acid, xxvii, 197.

Detection of adulterations in alcohol, xix, 71. ---- ---- in ammonia, xix, 72. ---- ---- in arrow root, xix, 72. ---- ---- in calomel, xix, 72. ---- ---- in castor oil, xix, 77. ---- ---- in chromate of lead, xix, 73. ---- ---- in copaiva, xix, 73. ---- ---- in iodide of potassium, xix, 74. ---- ---- in lemon juice, xix, 75. ---- ---- in morphine, xix, 75. ---- ---- in oil of sweet almonds, xix, 76. ---- ---- ----, of olives, xix, 76. ---- ---- in peroxide of manganese, xix, 78. ---- ---- in Peruvian bark, xix, 81. ---- ---- in phosphate of soda, xix, 82. ---- ---- in prussic acid, xix, 70. ---- ---- in soda, xix, 83. ---- ---- in sulphate of magnesia, xix, 84. ---- ---- in sulphate of quinine, xix, 84. ---- ---- in tartrate of potash, xix, 85. ---- ---- in tartar emetic, xix, 86. ---- ---- in vinegar, xix, 86. ---- of arsenic, iii, 354; iv, 155; xliv, 213. ---- ----, _L. Feuchtwanger_ on, xix, 339.^f ---- ----, _Riench's_ mode, xliv, 240. ---- ----, _J. L. Smith_ on, xl, 278; xlii, 75.^f

Devonshire, structure of, _Sedgwick_ and _Murchison_, xxxi, 349^f; xxxiii, 85. ----, lines of dislocation in, _De la Beche_, xxi, 354.

Dewpoint, remarks on, _A. A. Hayes_, xviii, 63.

_Dewey, C._, aurora borealis at Rochester, N.Y., July, 1837, xxxiii, 143. ----, ---- ---- of Sept., 1839, xxxviii, 146. ----, an early autumn indicated by the indigenous plants which blossom late, ii, 255. ----, on making meteorological observations, xi, 59. ----, sunsets in the west, xxxviii, 151; xlii, 200. ----, temperature of Lake Ontario, xxxvii, 242. ----, caricography by, vii, 264; viii, 93, 264; ix, 60, 257; x, 30, 265; xi, 147, 304; xii, 296; xiv, 351; xxv, 140; xxvi, 107, 376; xxvii, 236; xxviii, 270; xxix, 245; xxx, 59; xxxix, 50; xliii, 90; xlviii, 140; xlix, 42. ----, carices in the herbarium of Muhlenberg, xxv, 143. ----, ---- collected in Arctic America, xxvii, 240. ----, on the conduction of water, xxviii, 151; xxxi, 266. ----, on crystallized steatite, and ores of iron and manganese, v, 249. ----, hydrargillite, iii, 239. ----, Wavellite, from Richmond, Mass., ii, 249; iii, 239. ----, analyses of argentine and crystallized steatite, vi, 333. ----, mineralogy and geology of Williamstown, Mass., i, 337. ----, geology and mineralogy of part of Massachusetts, and some portions of the adjoining states, viii, 1^f, 240. ----, geological section from Taconick range in Williamstown, to Troy, ii, 246. ----, notice of the flexible or elastic marble of Berkshire Co., Mass., ix, 241. ----, on the polished limestone of Rochester, xxxvii, 240. ----, striæ and furrows of the polished rocks of western N. York, xliv, 146. ----, singular conformation of limestone, ix, 19.^f ----, on the rocks of New York, xxxiii, 121. ----, naphtha in quartz crystals, i, 345.

Deweylite from Middlefield, Mass., analysis of, _C. U. Shepard_, xviii, 81. ----, analysis of, _T. Thomson_, xxxi, 173.

_De Witt, S._, mode of drawing ellipses, xxiv, 369.^f ----, a conical raingauge, xxii, 321.^f ----, obituary notice of, xxvii, 395.

Diabetes, cause of, xlix, 202.

Diabetic urine, to detect sugar in, xlix, 200.

Diallage allied to Augite, xx, 168. ----, in Connecticut, vi, 227.

Diamonds at Algiers, xxviii, 394. ----, pretended artificial, xvi, 394. ----, matrix of, _D. Brewster_, xxix, 366. ----, on the origin and the use of, xvii, 372. ----, remarkable, v, 175. ----, new structure in, _D. Brewster_, xxxiv, 37. ----, supposed locality in the United States, xxix, 394. ---- mines of Russia, xix, 199.

Diamond Hill, N. Y., ii, 13.

Diathermancy, _M. Melloni_, xxvii, 228; xl, 313.

Dichroism of the palladio-chlorides of potassium and ammonium,
xliv, 165.

_Dickson, J._, geology and mineralogy of parts of N. and S. Carolina,
iii, 1.

Dicobune, xxxvii, 232.

Dictionary of Anamitic and Latin, _Taberd_, xl, 43. ----, Morrison's Chinese, iii, 377. ---- of ancient and modern Greek, in course of publication, iii, 381.

Didymium, a new metal, xliii, 404. ---- and cerium, method of separating the oxides of, xlvi, 206.

Differential calculus, on the first principles of, _T. Strong_, xlv, 269. ----, equations of the second order, integration of, xlii, 273.

Dikes, observed to have a crescent shape in Connecticut, _J. G. Percival_, xlvi, 205. ---- of trap, cause of crescent form, _H. D. Rogers_, xlv, 334. ---- ----, in the Connecticut valley, vi, 47, 56.^f ---- ----, of Maine, of four different ages, _C. T. Jackson_, xxxvi, 145. ---- ----, in Massachusetts, near Lowell, and at Nahant, &c., xxvii, 342. ---- ----, in Michigan, _D. Houghton_, xli, 184. ---- ----, in granite, New Hampshire, numerous, _O. P. Hubbard_, xxxiv, 105.^f ---- ----, or natural walls, of Rowan, N. C., xiv, 242. ---- ----, in Montgomery, Vt., xxii, 189. ---- ----, connection of, with the iron ores of Essex Co., N. Y., _E. Emmons_, xl, 81. ---- ----, effect on limestone, xxix, 351. ---- ----, action on mica slate, xxvii, 343. ---- of porphyry in Nova Scotia, xv, 203, 213.

Dilatation of gases, _V. Regnault_, xliv, 63.

Diluvial action, in Sullivan Co., N. Y., facts relating to, _W. A. Thompson_, xxiii, 243. ---- scratches, see _Scratches_.

Dimorphism, viii, 378; xlvi, 370.

Dinornis, notice of, _G. A. Mantell_, xlv, 184, 188. ----, ----, and on the Ornithichnites, _R. Owen_, xlv, 185; xlviii, 194. ----, bearing of, on the subject of fossil footprints, xlviii, 199.

Dinotherium, _R. Harlan_, xli, 178.

Diophantine problems, solutions of two, _T. Strong_, xxxi, 156.

Dioptase, analysis of, Damour, xlvii, 216.

Dip, magnetic, daily variation in, _M. Kupffer_, xxv, 194. ----, ----, in different regions, _T. H. Perry_, xlvii, 84. ----, ----, at St. Petersburg, xxi, 382. ----, ----, in the U. States, xl, 380. ----, ----, ibid, _J. Locke_, xxxix, 319; xl, 149; xli, 15. ----, ----, ibid, _E. Loomis_, xxxiv, 290^f; xxxix, 41^f; xliii, 93. ----, ----, at Baltimore, _J. Locke_ and _Nicollet_, xlii, 238. ----, ----, at Baltimore and Philadelphia, _A. D. Bache_, xl, 375. ----, ----, at Nantucket, Mass., _W. Mitchell_, xlvi, 157. ----, ----, in Ohio and Michigan, _E. Loomis_, xxxviii, 397.

Diplomatic cipher, new, iv, 377.

Dipping compass, on the manipulations of, _J. Locke_, xlii, 235. ---- needle, theory of adjusting, _T. H. Perry_, xxxvii, 277. ---- ----, see _Magnetic Needle_.

Dipyre, xlvii, 417.

Disease among shell fish, _S. P. Hildreth_, xxxii, 97.^f

Disinfection by means of alkaline chlorides, xiii, 169. ---- ---- of alcohol, xiii, 174.

Disintegration of the dolomites of the Tyrol, _Daubeny_, xlii, 321.

Dislocations, lines of, in Devonshire, _De la Beche_, xxxi, 354. ---- of strata in the U. States, _E. Hitchcock_, xli, 268.

Diving bell, descents in, at Portsmouth, N. H., _T. Alden_, xxii, 325. ---- ----, heat during descent in, xxv, 196.

Divining rod, iii, 102; xi, 201.^f

Divisibility of a finite quantity of matter, on the infinite, _S. Clark_, ix, 356. ----, remarks on, x, 99.

_Dix, D. L._, notice of the Aranea aculeata, Philæna antiqua, and some
Papiliones, xix, 61.^f

_Dixon's_ manufacture of lead pots, xxi, 196.

_Döbereiner's_ researches respecting platina, xviii, 151. ----, on formic acid, xxviii, 126. ----, new compounds of platinum, xxviii, 130.

_Dobson, P._, remarks on the origin of boulders, x, 217. ----, views on boulders, _Murchison's_ citation of, xliii, 200.

Dog, tongueless, retaining the power of barking, xxxvi, 194. ---- sleds of the Northwest, xiii, 391.^f

Dogs, anecdote of, xlvi, 243.

Dolomisation, theory of von Buch, _Daubeny's_ objections to, xxxi, 372. ----, ---- ----, facts in Maine, not confirmatory of, _C. T. Jackson_, xxxvi, 147.

Dolomite, analysis of, iv, 17.

Dolomites of the Tyrol, disintegration of, _C. Daubeny_, xlii, 321. ----, in Africa, iv, 33. ----, in Connecticut, ii, 206; v, 36; viii, 255. ----, in Massachusetts, (fetid,) iii, 239; viii, 35. ----, in New York, iv, 17.

Dominica, raised coral reef of, iv, 218.

Donium, supposed new metal, _T. Richardson_, xxxi, 163.

_Donovan, E._, notice of the works of, xxxvii, 163.

_Doolittle, A._, the earliest American engraver, xxii, 183.

_Doolittle, I._, on a new method of charring wood, xvii, 395.^f ----, on crank motion, xii, 367; xiv, 60.^f ----, gelatine from bones, i, 170. ----, description of a hydrostat, xiii, 64.^f ----, on the revolving steam engine of Morey, ii, 101.^f

_Doornik, J. E._, observations on the use made of fossils in geological
science, xv, 90.

Dorudon, xlix, 216.

_Douglas, D._, obituary notice of, xxx, 196.

_Douglass, D. B._, plants from the headwaters of the Mississippi,
iv, 56.

_Dové_, on the laws of storms, xliv, 315.^f ----, ---- ----, strictures on, by _R. Hare_, xliv, 137. ----, ---- ----, reply to _R. Hare's_ strictures on, by _W. C. Redfield_, xliv, 384.

_Downing, A. J._, on the order Cycadeæ and the seed of Cycas revoluta,
xxxii, 45.^f

Draining, extensive, in Russia, v, 393.

_Draper, J. W._, allotropism of chlorine, as connected with the theory of substitutions, xlix, 346.^f ----, carbonic acid and alkaline carbonates, decomposition of, by the light of the sun, xlvi, 398. ----, coins and medals, xxix, 157. ----, electricity, influence of, on capillary attraction, xxvi, 399. ----, elementary substance, change in, from exposure to the sun's rays, xlvi, 390. ----, idolatry and philosophy of the Zabians, xxviii, 201. ----, light, latent, xliv, 202. ----, tithonometer, xlvi, 217.^f

Dreelite, analysis of, xxx, 380.

Drift, discussion on, at the Association of American geologists and naturalists, 1842, xliii, 151. ----, _P. Dobson's_ views on the iceberg theory of, xlvi, 169. ----, _J. L. Hayes_, on the probable influence of icebergs on, xlv, 316, 326. ----, _E. Hitchcock_, theory of the U. States, xli, 248. ----, ----, singular instance in Berkshire Co., Mass., xlvii, 132; xlix, 258.^f ----, ----, influence of ice on, xlv, 324. ----, ----, copper in, Mass., xlv, 331. ----, _C. T. Jackson_, remarks on, xlv, 320. ----, _Nicollet_, remarks in opposition to the glacial theory, xlv, 323. ----, _W. C. Redfield_, influence of ice on, xlv, 325. ----, _H. D. Rogers_, remarks on, xlvii, 263. ----, ----, connection of, with earthquake vibrations, xlvii, 273. ----, see farther under _Boulders_ and _Scratches_.

Drowned person, time of, under water, determined, xviii, 170.

Drowning, resuscitation from, by oxygen gas, xvi, 250.

Druids were Zabians, xxviii, 214.

Drummond's mode of lighting light-houses by means of lime, xxi, 366.

Dry rot, _G. Gibbs_, ii, 114. ---- ----, cause of, xxx, 182. ---- ----, _P. Rainey_, xxxiv, 169. ---- ----, brief strictures on an article on, in vol. xxxiv, _J. T. Plummer_, xlii, 197.

Drunkenness, remedy for, iv, 385.

_Ducatel, J. T._, and _J. H. Alexander_, report on the geology of Maryland, xxvii, 1. ----, experiments on potassium and sodium, xxv, 90.

_Dumas, J._, on the determination of nitrogen in organic compounds,
xxviii, 134.

_Dumont's_ filter and prepared charcoal, xxiii, 346.^f

_Duncan, H._, on the footprints of animals in sandstone in Scotland,
xv, 84.

_Dunn's_ Chinese collection at Philadelphia, xxxv, 391.

_Durant, C. F._, improvement of the barometer, xxvii, 97.^f

_Dwight, H. E._, account of the Kaatskill mountains, ii, 11.

_Dwight, Benj. W._, facts illustrative of the powers and operations
of the human mind in a diseased state, i, 431.

_Dwight, S. E._, on the eruption of Long lake and Mud lake, Vt., xi, 39.^f ----, notice of a meteoric fireball, xiii, 35.

Dye, new blue, by _Robiquet_, xxii, 197. ----, superior green, vii, 196. ----, pink, from the flower of the sweet balm, xxv, 413. ----, for hats, from oak bark, xxii, 383. ----, employment of iodine as, xv, 394.

Dyeing, experiments on coloring matter for, _M. Persoz_, xxiv, 380. ----, use of chesnut wood in, i, 312.

E.

Eagle, bald, iv, 89.

Earth, action of gravity variable, and producing errors in the determination of the figure of, xv, 172. ----, _Cordier's_ essay on the temperature of, noticed, xv, 109. ----, ----, on fluidity of the centre of, xv, 117, 118. ----, ----, on tides in the surface of, xv, 123. ----, ----, change of level in the crust of, owing to contraction or to tides in the fluid interior, xv, 122, 124. ----, _Fourier_ on the temperature of, xxxii, 1. ----, heat of the interior of, _R. Patterson_, xxxvii, 357. ----, remarks on the theory of central heat, _W. Maclure_, xv, 384. ----, deductions from the igneous theory of, _J. H. Lathrop_, xxxix, 90. ----, oblateness and axes of, degree of a meridian, &c., _T. J. Cram_, xxxi, 222.^f

Earthenware and porcelain, on the art of, xxvi, 233. History of the art,
xxvi, 233.^f

Earthquakes in America: ---- ----, South, _M. Hamilton_, xli, 57. ---- ----, ----, in Chili, 1835, xxviii, 336. ---- ----, ----, at eruption of Cosiguina, xxviii, 332. ---- ----, in U. States, i, 93; xliv, 419. ---- ----, ----, in New England, xxxix, 336; xl, 204, 205, 206. ---- ----, ----, in Connecticut, Aug., 1840, xxxix, 335. ---- ----, ----, ----, at Hartford, Apr. 12, 1837, xxxii, 399. ---- ----, ----, ----, E. Haddam subterranean noises, xxxix, 336. ---- ----, ----, Mississippi, notice of, iii, 20. ---- ----, ----, ibid, from the travels of _Flint_, xv, 366. ---- ----, ----, ibid, _F. C. Usher_, xxxi, 294.^f ---- ----, near the Saguenay, _R. H. Bonnycastle_, xxx, 236. ---- ----, in West Indies, Feb., 1843, xliv, 419; xlvii, 182. ---- in Europe, in Sicily, 1823, ix, 216. ---- ----, at Florence, March, 1835, xxviii, 340. ---- in Asia, in Burmah, 1839, xxxviii, 385. ---- ----, at Cutch, 16th June, 1819, iv, 315. ---- ----, in Palestine, xlviii, 14. ---- ----, at Tabriz, xxxvii, 351. ----, causes and effects of, _I. Lea_, ix, 209. ----, remarks on, xiv, 72. ----, _G. Bischof_ on the natural history of, xxxvii, 41.^f ----, ----, instances of, xxxvii, 41, 47. ----, ----, causes of, xxxvii, 42. ----, ----, connection with volcanoes, xxxvii, 43. ----, ----, propagation of, xxxvii, 46. ----, ----, direction of, xxxvii, 47. ----, ----, elevation from, xxxvi, 273. ----, ----, elevation of the Andes, xxxvii, 49. ----, ----, state of the barometer not a cause, xxxvii, 50. ----, ----, theory of central heat, xxxvii, 52. ----, _Necker's_ views, xxxvii, 236. ----, _H. D. Rogers_, characters of some recent, as bearing upon the dynamics of geology, xlv, 341. ----, ----, undulatory character of, xlvii, 274. ----, ----, on undulations of, a cause of flexure in rocks, xliii, 177; xlv, 341. ----, effects of, on the growth of wheat, ix, 208.

East and West Rock, N. Haven, Ct., geological structure of, vi, 44. ----, scenery of, vii, 1.

_Eastman, R._, improved rotary saw machine, v, 146.^f

_Eaton, A._, alcohol, observations on, xvi, 173. ----, geology of the Highlands, N. York, v, 231. ----, ---- and meteorology west of the Rocky Mts., xxv, 351. ----, ---- along the Erie canal, viii, 358; ix, 355; xiii, 383. ----, ----, coal formations of N. York, xix, 21. ----, ---- of northern states, notice of Index to, i, 69. ----, ----, Cherty limerock, xxxvi, 61. ----, ----, coal, anthracite, Washington Co., N. Y., xvi, 299. ----, ---- of Southampton Lead mine, i, 136. ----, ----, diluvial deposits in N. York and elsewhere, xii, 17. ----, gravel near Troy, v, 22. ----, North American localities, showing equivalency of rocks on opposite sides of the Atlantic, xxxix, 149. ----, cardinal points in stratiographical geology, xxi, 199. ----, geological equivalents, xxi, 132. ----, ----, nomenclature of rocks, xiv, 145^f, 359. ----, ----, Prodromus, xvii, 63. ----, gold rock of the south is talcose slate, xviii, 50. ----, ----, ----, of Mexico equivalent to that of the Carolinas, xx, 124. ----, Boletus igniarius, analogous to animal substances, vi, 177. ----, Crotalus reliquus, xx, 122.^f ----, gases and salts forming near Erie canal, xv, 233. ----, living antediluvial animals, xv, 233. ----, number _five_ a favorite in nature, xvi, 172. ----, magnetic needles, improvement in manufacture of, xii, 14. ----, trilobites, xxii, 165. ----, notice of new edition of the Geological Text Book of, xxii 391. ----, remarks by _D. Thomas_ on the views of, on the coal formations of New York, xix, 326.

Ebullition by cold, apparatus for producing, _R. Hare_, xxxiii, 248.^f

Echinus, see ZOOLOGY, _Radiata_.

Echo, in Virginia, _C. G. Page_, xxxvi, 174. ----, in N. York state, _J. B. Church_, xxxvi, 175. ---- a means of determining the depth of a sea, not effectual, _C. Bonnycastle_, xxxviii, 160.

Eclipse, solar, Feb. 12, 1831, xxii, 189. ----, ----, in 1834, observation on, _L. Brant_, xxvii, 386. ----, ----, of May, 1836, observations on, xl, 29. ----, ----, of Sept., 1838, observations on, xxxviii, 158, 163, 172, 174; xl, 29. ----, ----, ----, observations on, _D. Olmsted_, xxxv, 174. ----, ----, ibid, micrometric measures, _E. P. Mason_, xxxv, 176. ----, ----, of July, 1842, xlii, 175; xliii, 401; xliv, 211. ----, ----, ----, observations suggested by, xlii, 395.

Edinburgh, on the geology of Calton Hill, near, _J. W. Webster_, i, 230.^f ----, freshwater limestone of Burdie House, _S. Hibbert_, xxviii, 365.

_Edmondson, T._, modification of _Ampère's_ rotating galvanic element, xxvi, 370.^f ----, rotating armatures, xxvi, 205^f; xxxii, 399.

Education in Africa, ii, 343. ---- ----, in Egypt, xii, 389. ---- in England, number of students at Cambridge and Oxford, xix, 195. ---- in Europe, by schools of mutual instruction, iv, 199. ---- ----, in Austria, Vienna Polytechnic Institute, x, 379. ---- ----, in Belgium, at Brussels, vii, 382. ---- ----, in Denmark, xii, 189; xiii, 173; xvii, 394. ---- ----, ----, at Copenhagen, x, 175. ---- ----, ----, ----, bequest for, ix, 183. ---- ----, ----, ----, deaf and dumb, xii, 197. ---- ----, in France, vii, 199; xii, 392. ---- ----, ----, in Paris, free commercial school, x, 171. ---- ----, ----, ----, _M. Cochin's_ munificence, xvii, 394. ---- ----, ----, at Caen, in prison, v, 382. ---- ----, ----, at Lyons, xx, 174. ---- ----, ----, at Marseilles, v, 191. ---- ----, in Germany or Prussia, viii, 185; xiii, 159; xx, 388. ---- ----, ----, Halle University, xiv, 381. ---- ----, ----, Berlin Rural School, ix, 187. ---- ----, ----, at Munich, iv, 196. ---- ----, ----, Wurtemberg university, viii, 183. ---- ----, in Greece, at Chios, iv, 196. ---- ----, in Holland or Netherlands, xviii, 182. ---- ----, ----, at Maestricht, by mutual instruction, v, 386. ---- ----, in Hungary, xiii, 165. ---- ----, in Poland, at Warsaw, ix, 186. ---- ----, in Portugal, vii, 198; ix, 187. ---- ----, in Russia, v, 176; xx, 176. ---- ----, ----, St. Petersburg Greek Seminary, vi, 387. ---- ----, ----, endowment of schools by a princess, iv, 386. ---- ----, in Sweden, ix, 182. ---- ----, in Switzerland, vi, 391; vii, 381; xii, 191; xiii, 397. ---- ----, ----, at Bâle, rural school, ix, 368. ---- ----, ----, at Geneva, v, 179, 380; x, 383. ---- in U. States, xx, 413. ---- ----, in New York, xv, 401; xxii, 415; xxv, 258; xxvii, 177; xxx, 389; xlix, 176. ---- ----, in Connecticut, N. Haven Gymnasium, xiii, 385. ----, different systems of, _W. Maclure_, ix, 160, 163. ----, mutual instruction schools in Europe, iv, 199. ----, _M. Ordinaire's_ method, vii, 199, 383. ----, Owen's plan, ix, 383. ----, Owen's establishment, x, 165. ----, Pestalozzian system, _W. Maclure_, ix, 163; x, 145. ----, new method in Latin, v, 182. ---- of the poor, iii, 379. ----, American Annals of, _W. C. Woodbridge_, xix, 174, 357. ---- and government of boys, vii, 161. ----, original papers relating to a course of liberal, xv, 297.

_Edwards, J._, observations on spiders, xxi, 109.^f

Edwardsite, new mineral, with an analysis, _C. U. Shepard_, xxxii, 162. ----, identical with monazite, _G. Rose_, xxxix, 249. ----, ibid, _C. U. Shepard_, xxxix, 251. ----, crystallization of, xxxiii, 202.^f

Eggs, artificial incubation, ix, 196. ----, mode of blowing for preservation, xxi, 161. ----, means of preserving, v, 379. ----, Scotch method of preserving, xxvi, 188.

Egypt, notices of, xxviii, 23.^f ----, notice of works in, iii, 378. ----, ---- the canal of Mahommaddie, xxviii, 27. ----, ---- the Nile, xxviii, 28. ----, ---- Mahomet Ali, xxviii, 30. ----, education in, xii, 389. ----, embalmed ibis, bat, &c. from, _S. G. Morton_, xli, 187. ----, statistics of, vi, 389. ----, position of Memphis in, xxxi, 373.

Egyptian crania, observations on, _S. G. Morton_, xlviii, 268.

_Ehrenberg, C. G._, on recent and fossil infusoria, xxxiii, 111; xxxv, 371^f; xxxvii, 116. ----, ibid, American, distribution, extent and influence of, xliii, 393; xlvi, 297.^f ----, ----, ----, in Virginia, xlvi, 300; xlviii, 201. ----, ----, ----, in New York, at West Point, xlvi, 303. ----, ----, at Berlin, xlii, 388. ----, ----, general results of researches on, xlvii, 208. ---- and _Hemprich_, journey in northern Africa, vii, 195.

Elaine from oils, new mode of obtaining, _M. Pechet_, ix, 189. ----, separation of, from oils, xiii, 186. ----, and stearine, vi, 377.

Elasticity, an experiment on, with wine-glasses, xxii, 190.^f

Elaterite, or fossil caoutchouc, xl, 215.

Electrepeter, _Clarke's_, xxxiii, 224.^f ----, new form of, _C. G. Page_, xxxiii, 377.^f ----, magnetic and electrotome, _C. G. Page_, xxxv, 112.^f

Electric amalgam, _W. R. Johnson_, xxv, 68. ---- battery, i, 292.^f ---- brush, _R. Hare_, xxxii, 277.^f ---- currents along the muscles and nerves different, xix, 180. ---- ---- in the nerves, on the hypothesis of, _M. Matteucci_, xlix, 387. ---- ----, course of, in electric discharges, _W. R. Johnson_, xxv, 58. ---- ----, effect of placing a candle between the poles, _W. R. Johnson_, xxv, 59. ---- ----, two or more over the same conductor without interference, _S. F. B. Morse_, xliv, 418.^f ---- ---- and sparks from magnets, _J. Henry_, xxii, 403. ---- ----, ponderable matter transported by, xii, 383. ---- discharges, lateral, _J. Henry_, xxxiv, 16.^f ---- discriminator, (electroscope,) _R. Hare_, xxv, 136.^f ---- excitement in leather by friction, xxxvii, 197. ---- ----, peculiar case of, in a woman, xxxiii, 394; xl, 386. ---- experiments, season favorable for, _W. R. Johnson_, xxv, 60. ---- fish, on the coast of Cape Cod, _D. H. Storer_, xliv, 213. ---- ----, Gymnotus, xl, 386. ---- fluids, the existence of two, opposed by _R. Hare_, vii, 103.^f ---- ----, observations on, _C. G. Page_, xxxvi, 353. ---- induction, decomposition of water by, _M. Hachette_, xxiv, 142. ---- ----, currents of electricity from, of different orders, _J. Henry_, xxxviii, 232.^f ---- ----, polarity produced by, xxxviii, 3. ---- ----, _R. Hare_, letters on, to _M. Faraday_, xxxviii, 1, 19; xli, 1. ---- ----, _M. Faraday_, in reply to _R. Hare_, xxxix, 108; xlii, 291. ---- jar, on the discharge of, xxxviii, 6. ---- kite, for determining the electricity of the upper currents of the air, _J. Swaim_, xxxii, 304.^f ---- lady, explanation of, xxxiii, 394; xl, 386. ---- light, a mode of producing, viii, 380. ---- machine, form and arrangement of, _W. R. Johnson_, xxv, 66. ---- ----, plate, viii, 378. ---- ----, ----, _R. Hare_, vii, 108^f; xxxii, 272.^f ---- ----, communication of, with the earth not necessary, _R. Hare_, xxiv, 253. ---- pile, theory of, xix, 375. ---- shock from a cat, mode of receiving, viii, 391. ---- sound, xlix, 390. ---- spark, _W. R. Johnson_, xxv, 57. ---- ----, length of, as affected by the size of the balls, _W. R. Johnson_, xxv, 60. ---- ----, perforations by, in a quire of paper or card, _W. R. Johnson_, xxv, 64. ---- ----, ----, ibid, _C. G. Page_, xxxvi, 353. ---- ---- drawn from a heated stove, xl, 385, 386. ---- ----, remarks on the so-called positive and negative, _R. Hare_, xxxii, 275.^f ---- ----, _Wheatstone's_ experiment to determine whether there is a sensible duration to, xxviii, 60. ---- ----, from magnets, _J. Henry_, xxii, 403. ---- ----, ----, _J. P. Emmet_, xxiv, 78.^f ---- syringe, _C. G. Page_, xxvi, 110.^f

ELECTRICITY.

----, animal, mode of receiving a shock from a cat, viii, 391.
----, ----, peculiar case in a woman, xxxiii, 394; xl, 386.
----, ----, of fish on the coast of Cape Cod, _D. H. Storer_,
xliv, 213.
----, ----, _Matteucci_ on, xxi, 157.
----, ----, observations on, _Linari_ and _Matteucci_, xxxii, 198;
xlix, 388.
----, atmospheric, water decomposed by, xx, 179; xxi, 368.
----, ----, observations on, _M. Matteucci_, xxx, 376.
----, blasting by means of, xvi, 372.^f
----, capillary attraction influenced by, _J. W. Draper_, xxvi, 399.
----, ----, ---- productive of, ix, 193.
----, conducting power of liquid gases, xxi, 374.
----, ----, ---- of the metals, xii, 199.
----, ----, ---- of steam, xxvii, 206.
----, ----, ---- of the solar rays, xvii, 391.
----, the conductibility of, by liquids, increased by adding water,
xvii, 165.
----, by contact, _Karsten_, xxxi, 159.
----, decomposition of water by atmospheric and common, xxi, 368.
----, discharge, lateral, _J. Henry_, xxxiv, 16.^f
----, effects of, on vegetation, _M. Baric_, xxxi, 160.
----, fluids of, one or two, _R. Hare_, vii, 103.^f
----, ----, ibid, _C. G. Page_, xxxvi, 353.
----, generation of, by the electrical machine, _G. W. Rains_,
xlix, 93.^f
----, evaporation in gilding, producing, v, 198.
----, induced currents of different orders produced by, _J. Henry_,
xxxviii, 232.^f
----, influence of, on the process of beer making, xxxiv, 8.
----, ----, on capillary attraction, xxvi, 399.
----, ----, on odors, xv, 394.
----, ----, on phosphorescence, _T. J. Pearsall_, xxi, 378.
----, light acting on an iodized plate, producing, xlvii, 190.
----, machinery producing, _A. Smith_, xxxix, 134.
----, medical, _J. Hall_, iii, 166.
----, motion producing and motion produced by, _J. Locke_, xxxiv, 130.
----, needle deflected by, xii, 199.
----, of peroxide of manganese, xxx, 179.
----, ponderable substances transferred by, _A. Fusinieri_, xxii, 355.
----, principles of, in 1833, _A. de la Rive_, xxvi, 175.
---- produced by the action of light on an iodized silver plate,
xlvii, 190.
---- ---- by machinery, _A. Smith_, xxxix, 134.
---- ---- by a separation of parts, or fracture, viii, 379.
---- from steam, xl, 382.
---- of the tourmaline, xvi, 390.
---- retained in a vacuum, xxix, 354.
----, science of, in 1833, _A. de la Rive_, xxvi, 175.
----, theory of, _J. D. Whelpley_, xlviii, 364.
----, ----, _Van Marum_ on, iii, 385.
---- and magnetism, connection between, iii, 386.^f
----, heat and magnetism, on the connection of, _J. F. Dana_,
vi, 163.^f
----, thermo-, see _Thermo-Electricity_.
----, Galvanic battery, _E. de Butts_, viii, 271.^f
---- ---- of carbon, xxxix, 132.
---- ---- ----, _B. Silliman, Jr._, xliii, 393; xliv, 180.^f
---- ----, _Crosse's_, some account of, xxxii, 372.
---- ----,_ De la Rive's_, v, 395.
---- ----, dry, xii, 195; xvii, 162.
---- ----, _Grove's_, xxxviii, 116.
---- ----, ----, experiments with, _S. F. B. Morse_, xlv, 390.^f
---- ----, _R. Hare's_ new modifications of, iii, 105.^f
---- ----, ----, calorimotor, i, 413; v, 94, 357, 364; vi, 337;
xxxii, 284.^f
---- ----, ----, deflagrator, iii, 105^f; iv, 201; v, 94; vi, 337;
vii, 347^f; viii, 99; ix, 181; xl, 48.
---- ----, ---- ----, improved form of, _M. Faraday_, xxxii, 170.
---- ----, ----, combining the advantages of the trough of
Cruikshank with the deflagrator, xxxii, 285.^f
---- ----, of great power, _F. W. de Moleyns_, xliv, 357.
---- ----, _J. Henry_, on a spark from a long conductor uniting the
poles of, xxviii, 327.
---- ----, ----, action of a spiral conductor, xxviii, 329.
---- ----, _C. G. Page_, on iron or any metal a substitute for
copper, xxxii, 197.
---- ----, ----, on the benefit of fresh immersion, xxxvi, 137.^f
---- ----, _W. B._ and _H. D. Rogers_, experimental enquiry into some
of the laws of, xxvii, 39.^f
---- ----, ----, relative influences of the zinc and copper,
xxvii, 41.
---- ----, ----, examination of _Ritchie's_ law of surface,
xxvii, 53.
---- ----, ----, influence of temperature, xxvii, 57.
---- ----, _J. B. Rogers_ and _J. Green_, ibid, xxviii, 33.
---- ----, ----, relative importance of the zinc and copper,
xxviii, 34.
---- ----, ----, relative distance of the plates, xxviii, 39.
---- ----, ----, deflecting power from different menstrua,
xxviii, 40.
---- ----, _W. Sturgeon_, difference in the effects of the two polar
wires, xxxix, 31.^f
---- ----, _Watkins'_ dry, xvii, 162.
---- blasting, _R. Hare_, xxi, 139; xxvi, 352^f; xxxviii, 188.
---- ----, _H. K. G. Morgan_, xxxviii, 33.
---- calorimotor, _Hare's_, i, 413^f; v, 94, 357, 364; vi, 337;
xxxii, 284.^f
---- ----, for galvano-ignition apparatus, _R. Hare_, xxxii, 284.^f
---- circle, theory of, _T. Graham_, xxxviii, 117.
---- currents, caloric a cause of, _J. P. Emmet_, xxv, 269.
---- ----, remarks on, xviii, 199.^f
---- ----, and sparks from the horse-shoe magnet, _J. P. Emmet_,
xxiv, 78.^f
---- deflagrator, _Hare's_, iii, 105^f; iv, 201; v, 94; vi, 337;
vii, 347^f; viii, 99; ix, 181; xl, 48.
---- ----, improved form of, _M. Faraday_, xxxii, 170.
---- experiments by _A. Crosse_, producing crystals, and, as
supposed, insects, xxxv, 125.^f
---- ----, by _R. Hare_, viii, 145.
---- ----, with grasshopper's legs, _J. W. Bailey_, xxxi, 292.^f
---- ignition of gunpowder, _R. Hare_, xxxvii, 269.
---- induction, _J. P. Emmet_, xxvi, 23.^f
---- lamp, an improvement in, by _Dr. J. Cutbush_, ii, 332.
---- 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 N. 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.
----, charcoal fused by, v, 108, 361; viii, 147, 288; xxxviii, 190.
----, ---- ----, _L. Vanuxem's_ examination of, viii, 292.
----, 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.
----, ----, _M. Becquerel_, xvii, 383.
----, crystals and insects, _A. Crosse_, xxxv, 125.^f
----, engravings copied by, _von Kobell_, xlviii, 221.^f
----, engravings and medals 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; xlix, 227.
----, ----, ----, _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, _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
----, ----, 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_.

Electro-magnetic apparatus, _J. H. Abbot_, xl, 104.^f ---- - ---- ----, _P. Barlow_, v, 396.^f ---- - ---- ----, _A. W. Campbell's_ engine, xxxv, 343. ---- - ---- ----, _E. M. Clarke_, (magneto-electric) xxxiii, 213^f; --electrepeter, xxxiii, 224.^f ---- - ---- ----, ----, modes of experimenting with, in decomposing water, xxxiii, 217.^f ---- - ---- ----, ----, mode of giving shocks, xxxiii, 216.^f ---- - ---- ----, ----, mode of scintillating iron wire, xxxiii, 219.^f ---- - ---- ----, ----, mode of adjusting the intensity armature, xxxiii, 218.^f ---- - ---- ----, ----, rotation by magnetic electricity, xxxiii, 221.^f ---- - ---- ----, ----, mode of igniting charcoal, xxxiii, 222.^f ---- - ---- ----, _T. Davenport_, xxxii, Append. after 216; xxxiii, 193. ---- - ---- ----, ----, rotary, xxxii, 216^f, App., and 399. ---- - ---- ----, _T. Edmonson_, modification of Ampère's rotating, xxvi, 370.^f ---- - ---- ----, ----, rotating armature, xxvi, 205^f; xxxii, 399. ---- - ---- ----, _J. Henry's_ application of a galvanic multiplier, xix, 400.^f ---- - ---- ----, _J. B. Joslin_, xxi, 86.^f ---- - ---- ----, _J. Locke_, and on magneto-electricity, xxxiv, 125.^f ---- - ---- ----, _B. R. McConnell's_ rotating, xxxiii, 188. ---- - ---- ----, _C. G. Page_, xxxiii, 191^f; xxxiv, 364; xlix, 131.^f ---- - ---- ----, ----, double axial reciprocating engine, xlix, 139.^f ---- - ---- ----, ----, with revolving armature, xxxvi, 350.^f ---- - ---- ----, ----, _C. G. Page_, compound electro-magnet, xxxv, 253.^f ---- - ---- ----, ----, electrotome, xxxv, 112^f, 253.^f ---- - ---- ----, ----, reciprocating armature engine, xxxv, 263.^f ---- - ---- ----, ----, with vibrating armature, xxxv, 267.^f ---- - ---- ----, ----, circular galvanometers, xxxv, 259^f;--with double helix for inducing magnetism, xxxv, 261.^f ---- - ---- ----, ----, electrepeter, new form of, xxxiii, 377^f; xxxv, 112.^f ---- - ---- ----, _W. H. Pepys_, vii, 195. ---- - ---- ----, _M. Pixii_, xxiv, 144, 146^f, 196. ---- - ---- ----, _J. B. Zabriskie_, model of engine, xxxii, 313.^f ---- - ---- ----, ----, rotating, xxxvi, 129.^f ---- - ---- currents, _A. de la Rive_, xxxiv, 6. ---- - ---- disc of _Arago_, xxiv, 143. ---- - ---- induction, see _Electro-dynamic_. ---- - ---- and magneto-electric formula, xxxv, 356.^f ---- - ---- properties of metalliferous veins, _R. W. Fox_, xx, 136. ---- - ---- telegraph, _S. F. B. Morse's_, xxxiii, 185.^f ---- - ---- ----, see farther, _Magneto-electric_.

Electro-magnetism, early experiments in, iii, 383; v, 391. ---- - ----, experiments in, _J. H. Abbot_, xl, 104.^f ---- - ----, _J. P. Emmet's_ discoveries (magneto-electric) in, xxiv, 78^f; xxvi, 311; xxviii, 331. ---- - ----, ----, on the cause of voltaic currents in, xxvi, 23.^f ---- - ----, _R. Hare's_ experiments, viii, 145. ---- - ----, _R. Hare's_ experiments, in confirmation of _Henry's_, xx, 143. ---- - ----, _M. Jacobi_ on, as a moving power, xl, 339. ---- - ----, ----, ibid, laws of, xl, 340. ---- - ----, _G. Moll's_ experiments in, xix, 329. ---- - ----, ---- experiments to determine how far galvanic surfaces could be diminished and retain magnetic power, xxvi, 177. ---- - ----, _C. G. Page's_ experiments on the application of, as a moving power, xxxiii, 118, 190^f; xxxv, 106. ---- - ----, _M. Pixii's_ experiments in, xxiv, 144, 146^f, 196. ---- - ----, _J. B. Zabriskie_, on the induction of metallic coils, xxxii, 308.^f

Electrometers, iii, 372.

Electrometer, single leaf, _R. Hare_, vii, 351^f; viii, 99; xxv, 136.^f

Electromotors, _S. Dal Negro_, xxvii, 189. ----, new property of elementary, _S. Dal Negro_, xxv, 193.

Electrography, gilding by, xli, 402. ----, _v. Kobell_ on, xlix, 221.

Electroscope, _R. Hare_, xxv, 136.^f

Electrotome, _C. G. Page_, xxxv, 112^f, 253.^f

Electrotype, account of, _T. Spencer_, xl, 157.^f

Elephant, death of, iv, 393. ---- of Siberia, xxvii, 353. ----, fossil, near Bloomfield, Ohio, xxv, 256. ----, ----, Jackson Co., Ohio, xxxiv, 358^f, 363.^f ----, ---- remains, Irondiquot Creek, xxxii, 377. ---- bones and Mylodon (?) from Oregon, _H. C. Perkins_, xlii, 136.^f ---- ----, from near Beering's Straits, xvi, 382. ---- tooth, from near the shores of Lake Erie, xiv, 31.

Elevation above the ocean of some heights in Ohio, Michigan, Pennsylvania and New York, _C. Whittlesey_, xlv, 12. ---- ---- ibid in western New York and of Lake Erie, _C. Dewey_, xxxiii, 122. ---- ---- ---- in Wisconsin, _I. A. Lapham_, xlvi, 258.

Elevation, _Hopkins'_ theoretical views respecting the geological phenomena of, xxxi, 365. ----, _G. E. Hayes_, on the effects of the ocean in western New York, during, xxxv, 86. ----, _W. W. Mather_ on causes of, in rise of sedimentary rocks of United States, xlix, 284. ----, _H. D._ and _W. B. Rogers_, theory of, xliv, 360. ---- of Ceylon, evidence of, vi, 194. ---- of the coast of Chili, xxviii, 236; xxx, 110. ---- ---- ---- and South America, _C. Darwin_, xxxiii, 100. ---- of the banks of the Mississippi, 1811, _F. C. Usher_, xxxi, 294.^f ---- of Sweden, _C. Lyell_, xxviii, 72, 387; xxix, 363. ---- of the Scandinavian coast, _L. Beamish_, xlvii, 184. ---- of Dominica, St. Christopher's, St. Eustatia and Saba, West Indies, indicated by raised coral reefs, iv, 218.

Elizabeth Islands, vii, 240.^f

Elk of Ireland, iv, 246. ----, fossil bones of, in North Carolina, xxvii, 170.

_Ellet, W. H._, on the compounds of cyanogen, xviii, 329.

Ellipses, mode of drawing, _S. De Witt_, xxiv, 369.^f ----, on the rectification of, _C. Wilder_, xviii, 38.^f

Elliptic motion, _T. Strong_, xxx, 248.

Elm-tree moth, parasite of the eggs of, xxxviii, 385. ----, destruction of the eggs of, by a parasite, _E. C. Herrick_, xl, 211.

Embalming, remarks on the mode of, xii, 183. ----, _J. N. Gannal's_ new process, xl, 194.

Emerald in Africa, ii, 354.

_Emerson, G. B._, biographical notice of A. P. De Candolle, xlii, 217.

Emery of Saxony, xxiv, 377.

_Emmet, J. P._, on formic acid, xxxii, 140. ----, ammoniacal salts, solvent and oxydating powers of, xviii, 255. ----, iodide of potassium a test for arsenic, xviii, 58. ----, electro-magnetism and thermo-electricity, xxvi, 311. ----, ----, new discoveries in, xxiv, 78.^f ----, ----, cause of currents in, xxvi, 23.^f ----, solidification of raw gypsum, xxiii, 209. ----, a mode of producing sparks and galvanic currents from the horse-shoe magnet, xxiv, 78.^f

Emmonite, supposed new mineral, _T. Thomson_, xxxi, 171.

_Emmons, E._, birds of spring, time of appearance in Williamstown, Mass., 1831-33, xxvi, 208. ----, circulation in vegetables, xxvi, 99. ----, granitic veins and beds of Chester, Mass., viii, 250. ----, Grevilleanum serratum, a new species of moss, xi, 183.^f ----, metamorphic changes by artificial heat, in sandstone, xlv, 146. ----, rainmarks in the Potsdam sandstone, xlv, 316. ----, strontianite in the U. States, xxvii, 182.

Enamel for porcelain, v, 189.

Enamelled cast iron vessels in Bohemia, xlix, 400.

Encroachment of the sea, near New York, _W. W. Mather_, xxxvi, 16.

Endogenites, vii, 179.

Enfield's Natural Philosophy, review of, iii, 125.

England, population of, xxiv, 211.

_Engelmann, G._, Braun's monography of N. American Equiseta, with additions, xlvi, 81. ----, Braun's Charæ of N. America, xlvi, 92. ----, catalogue of a collection of plants in Illinois and Missouri, xlvi, 94. ----, monograph of the N. American Cuscutineæ, xliii, 333^f; xlv, 73. ----, a mode of cupellation, xlii, 394.

Engine, explosive, of _S. Morey_, account of, xi, 104. ----, steam, see _Steam engine_.

English lexicography, contributions to, _J. W. Gibbs_, xxxiii, 324;
xli, 28, 32; xlv, 96.

Engraving, a mode of enlarging, ii, 342. ----, a mode of biting-in, on steel, x, 194. ----, in _taille douce_, iv, 192. ---- on steel, _Perkins's_ invention, iii, 353.

Epicycloid, on the, _E. F. Johnson_, xxi, 280.^f

Epidemics, in Paris, during past years, xxv, 197.

Epidote of Franconia, N. H., account of, _C. U. Shepard_, xviii, 129.^f ----, crystals from Haddam, Ct., xlvi, 380.^f ----, localities of, in Canada, viii, 62. ----, ----, in N. Carolina, v, 262. ----, ----, in Connecticut, i, 354; ii, 240; vi, 223; viii, 258; xii, 170; xviii, 361. ----, ----, in Delaware, xiv, 11. ----, ----, Massachusetts, i, 114; iii, 364; vi, 223; vii, 253; viii, 235; ix, 43. ----, ----, New Hampshire, ii, 241; vi, 245; viii, 235; xviii, 129. ----, ----, in New Jersey, v, 243. ----, ----, in New York, ii, 241; iv, 47; vii, 58; ix, 41. ----, ----, in Pennsylvania, viii, 238; xiv, 6. ----, ----, in Rhode Island, iv, 285; x, 10. ----, ----, in Vermont, vii, 58; xvii, 354.

Epistilbite and Heulandite, identity of, xiii, 185.

Equations, differential of the second order, integration of, _T. Strong_, xlii, 273. ---- of the fourth degree, on the resolution of, xviii, 276. ---- of the third and fourth degree, method of resolving, _A. C. Twining_, ix, 86.

Equilibrium between living and dead forces, condition of,
_R. H. Fauntleroy_, xlvii, 241.^f

Equinoxes, precession of, vii, 323^f; viii, 132, 139.^f

Equiseta, N. American, _A. Braun's_ monograph, with additions
by _G. Engelmann_, xlvi, 81.

Equisetum arvense, xlvi, 83. ---- boreale, xlvi, 90. ---- eburneum, xlvi, 84. ---- giganteum, xlvi, 91. ---- hyemale, xlvi, 89. ---- lævigatum, xlvi, 87. ---- limosum, xlvi, 86. ---- palustre, xlvi, 85. ---- pratense, xlvi, 85. ---- robustum, xlvi, 88. ---- scirpoides, xlvi, 91. ---- sylvaticum, xlvi, 84. ---- variegatum, xlvi, 90.

Equivalents, chemical, _Wollaston's_ scale of, xvi, 371. ----, ----, ----, improved, _L. C. Beck_ and _J. Henry_, xiv, 202. ----, ----, circular scale of, _J. Finch_, xviii, 196.

Eremite, a new mineral, _C. U. Shepard_, xxxii, 341.^f ----, crystallographic examination of, _J. D. Dana_, xxxiii, 70.^f ----, identical with monazite, _J. D. Dana_, xlv, 402.^f

Ergot of rye, _W. Tully, M. D._, ii, 45. ----, remarks on, xii, 398. ----, on the origin of, _M. Field_, ix, 359.

Erie canal, tolls on, x, 398.

Erratic blocks, over the northern parts of England, _Prof. Phillips_, xxxi, 360. ---- ----, ibid, _R. I. Murchison_, xxxi, 375. ---- ---- and glaciers in Switzerland, _Agassiz_, xli, 59, 190. ---- ---- of the North of Germany, xxviii, 389. ---- ----, large, in Invernesshire, vi, 158. ---- ---- and diluvial scratches, in the U. States, xli, 174. ---- ---- in New England, their positions attributed to a retiring ocean, ix, 28. ---- ---- in Rhode Island, _C. T. Jackson_, xl, 184. ---- ---- in Maine, _C. T. Jackson_, xxxvi, 152. ---- ---- in the Connecticut valley, vi, 85. ---- ---- in western New York, xxxvi, 39. ---- ---- in New York, about the sources of the Hudson and to the southward, xxxiii, 304, 315. ---- ---- on Long Island, xxxvi, 20. ---- ---- of Labrador feldspar, near Pompton, New Jersey, v, 241. ---- ---- of Ohio, _D._ and _I. A. Lapham_, xxii, 300. ---- ----, in the valley of the Muskingum, xxix, 11. ---- ---- in Illinois, xxxiv, 141. ---- ---- in Indiana, _J. T. Plummer_, xliv, 296^f, 303. ---- ---- of gneiss and granite on the Côteau des Prairies, _G. Catlin_, xxxviii, 142. ---- ---- of the Canadian lakes and valley of the St. Lawrence, _C. Lyell_, xlvi, 314. ---- ---- the origin of, remarks on, _P. Dobson_, x, 217. ---- ---- _Murchison's_ citation of _Dobson's_ views on, xliii, 200. ---- ---- transported by ice, in the polar current, _W. C. Redfield_, xxxii, 351. ---- ---- on the supposed transportation of, _J. E. DeKay_, xiii, 348. ---- ---- buoyancy of, at great depths, xxviii, 111. ---- ---- gravel, &c., remarks on, _Sedgwick_, xxxiii, 287. ---- ---- theory of, _B. Struder_, xxxvi, 325. ---- glacial theory of _Agassiz_, xlii, 352.^f ---- see farther under _Drift_ and _Scratches_.

Erythronium, supposed new metal, xx, 386.

Esophagotomy, iv, 383.

_Espy, J. P._, views on storms, xxxix, 120; xl, 327. ----, ---- ----, notice of, by _A. D. Bache_, xxxv, 280. ----, on the causes of the daily fluctuations of the barometer, xli, 42. ----, meteorological enterprise of, xliv, 212.

Esquimaux Indians, remarks on, xvi, 145.

Essential oils, reaction of, with sulphurous acid, _R. Hare_, xxxi, 281.

Essex county, (N. Y.) mountains of, and the sources of the Hudson,
_W. C. Redfield_, xxxiii, 301.^f

Etching glass with fluor spar, vi, 354.^f

Etna, ascent of, _S. L. Johnson_, xxvi, 1. ----, crater of, xxvi, 7. ----, earthquakes in 1823, ix, 216. ----, observations on, _E. de Beaumont_, xxxi, 168. ----, luminous flames at, xxxi, 169. ----, geological structure of, _F. Ferrara_, viii, 201.

Ether in space, idea of, when introduced, xxxiii, 1. ---- ----, resistance to motion of heavenly bodies, xvii, 389. ---- ----, examination of the theory of, _R. W. Haskins_, xxxiii, 1. ----, boracic, xlviii, 189. ----, chloric, new mode of obtaining, _S. Guthrie_, xxi, 64. ----, hydriodic, _M. Serullas_, xviii, 161. ----, hyponitrous, _R. Hare_, xxxv, 329. ----, nitrous, new process for, _R. Hare_, ii, 326. ----, nitric, process for, _R. Hare_, xxxiii, 241.^f ----, œnanthic, xxxii, 381. ----, perchloric, _C. Hare_ and _M. H. Boyé_, xl, 50, 382; xlii, 63. ----, silicic, xlix, 192. ----, sulpho-cyanic, xvii, 377. ----, sulphuric, on the manufacture of, xxii, 199. ----, sulphurous, _R. Hare_, xxxi, 275. ----, ----, and sulphate of etherine, _R. Hare_, xxxi, 275. ----, vaporization of, vi, 396. ----, action of, on sulphate of indigo, xxiv, 371. ----, odor of wines due to a peculiar, xxxii, 381 (œnanthic ether.)

Ethers of the vegetable acids, method of preparing, xlvii, 197. ----, and benzoic compounds, formulas for, _Wöhler_ and _Liebig_, xxvi, 285.

Etherine, sulphate of, _R. Hare_, xxxi, 275.
----, sulphate of, on the destructive distillation of, _C. Hare_,
xxxvi, 76.

Ethule, perchlorate of the oxide of, _C. Hare_ and _M. H. Boyé_,
xlii, 63.

Euchlorine, preparation of, vi, 164.