_J. Hall_, xlv, 349.
----, see farther, ZOOLOGY, _Radiata_.
Crocodile, fossil, in New Jersey, xvii, 289; xxvii, 353; xlviii, 265.^f
_Croom, H. B._, plants from Florida, xxv, 74.
----, botanical communications, including botany of Middle Florida,
xxvi, 313.
----, new localities of plants at the South, with notes and
descriptions, xxviii, 165.
----, organic remains in the marl pits of North Carolina, xxvii, 168.
Crotalus reliquus, _A. Eaton_, xx, 122.^f
_Crosse_, some account of galvanic apparatus of, xxxii, 372;
xxxv, 125.^f
----, supposed production of animal life, xxxii, 374^f; xxxiii, 272.
----, production of crystals and certain insects, xxxv, 125.^f
----, Acari of, xxxii, 374^f; xxxv, 125^f; xlix, 227.
----, ----, experiments of _W. H. Weekes_ in the production of,
xliii, 395.
Crucible, improved, viii, 389.
----, for glass houses, on the manufacture of, xvi, 112.
----, for fusion, xxiii, 384.
Crustaceans in Palæozoic rocks, _J. Phillips_, xlii, 326.
----, see farther under ZOOLOGY, _Articulata_.
Cryophorus, _Wollaston's_, vii, 140.
----, improved, _R. Hare_, xxxiii, 244.^f
Crystals, compound, formation of, _J. D. Dana_, xxx, 275.^f
----, drawing of figures of, _J. D. Dana_, xxxiii, 30.^f
----, models, of mica, xxxviii, 187.
----, a new fluid in, vii, 186.
----, two new fluids in, xii, 214.^f
----, naphtha in, _C. Dewey_, i, 345.
----, pseudomorphous, see _Pseudomorphous_.
----, cause of double refraction in, xxi, 299.
----, with rounded angles and bent, in New York, deductions from,
_L. C. Beck_, xlvi, 333.
---- in plants, discovered by _Turpin_, xix, 177; xx, 382.
---- ----, of oxalate of lime, _Turpin_, xxi, 372.
---- ----, _J. W. Bailey_, xlv, 149; xlviii, 17.^f
---- in geodes, facts tending to illustrate the formation of,
viii, 282.
---- ----, ibid, _J. D. Dana_, xlix, 52.
----, rotation of, while forming, indicating polarity, as seen under the
solar microscope, _B. F. Joslin_, xxxv, 150.
---- of Andalusite from Westford, Mass., xlvi, 381.^f
---- of apatite, bent and rounded, xlv, 143; xlvi, 365.^f
---- of anatase, xlvii, 215.^f
---- of Beaumontite, xlvi, 234.^f
---- of beryl, from Haddam, viii, 395; xl, 401^f; xlvi, 381.^f
---- ----, from Monroe, Ct., bent, xlvi, 366.^f
---- of calc spar, from Rossie, N. Y., _J. D. Dana_, xlvi, 33.^f
---- of chondrodite, xlvi, 381.^f
---- of Christianite, (anorthite,) xi, 261.^f
---- of chromic oxide, xxviii, 396.
---- of Columbite, xvi, 220^f; xvii, 357^f; xxx, 387.^f
---- of Danaite, xlvi, 384.^f
---- of datholite, of Roaring Brook, _J. D. Dana_, xlvi, 380.^f
---- of epidote, from Haddam, Ct., xlvi, 381.^f
---- ----, from Franconia, _C. U. Shepard_, xviii, 129.^f
---- of eremite, _C. U. Shepard_, xxxii, 341.
---- ----, _J. D. Dana_, xxxiii, 70^f; xlv, 402.^f
---- of galena, Rossie, xlvi, 366.^f
---- of Haydenite, xlvi, 379.^f
---- of Heulandite, of Paterson and Bound Brook, N. J., _L. C. Beck_,
xliv, 59.^f
---- of Humboldtilite, xi, 251.^f
---- of idocrase, from Amherst, N. H., xlvi, 381.^f
---- of iodic acid, xx, 185.
---- of iodine, xvii, 168; xviii, 84.^f
---- of iron, magnetic, distorted, _J. D. Dana_, xlvi, 365.^f
---- of Lederite, _C. U. Shepard_, xxxix, 357.^f
---- ----, _J. D. Dana_, xlvi, 36^f; xlviii, 180.
---- of ferro-silicate of manganese, from Rhode Island,
_C. U. Shepard_, xvii, 142.^f
---- of microlite, _C. U. Shepard_, xxvii, 361.
---- of pyrites, Rossie, _J. D. Dana_, xlvi, 36.^f
---- of quartz, bent, xlvi, 366.^f
---- ----, soft, from Carara, Italy, v, 394.
---- ----, distorted, xlvi, 365.^f
---- ----, containing globules of water, from Elba, iv, 27.
---- ----, ibid, in U. States, ii, 14; ix, 246.
---- ----, containing naphtha, _C. Dewey_, i, 345.
---- of serpentine, of Warwick, N. Y., ix, 242.
---- of Sillimanite, xlvi, 382.^f
---- of snow, ii, 337^f; iii, 367.^f
---- of staurotide, macle, _C. T. Jackson_, xlvi, 368.^f
---- of topaz, distribution of coloring matter in, and optical
properties of, vii, 364.
---- of zircon, tesselated, _J. D. Dana_, xlvi, 36.^f
Crystalline forms, two, presented by the same substance, viii, 378;
xlvi, 370.
----, substances from the juice of plants, xi, 391.
Crystallization, tendency to, in matter, xix, 381.
----, on the influence of air on, _M. Graham_, xvii, 373.
---- effected by the action of weak electric forces, _M. Becquerel_,
xvii, 383; xxviii, 291.
---- ---- ibid, _G. Bird_, xxxiii, 267.
---- ---- ----, _A. Crosse_, xxxv, 125.^f
----, an instance of instantaneous, _J. Green_, iii, 93.
---- of snow, _J. Green_, ii, 337.^f
----, curved, of gypsum, Mammoth Cave, Ky., _J. Locke_, xlii, 206.^f
---- the cause of the schistose structure and cleavage of some rocks,
_J. D. Dana_, xlv, 105.
---- of carbonate of potash, viii, 181.
---- of the carburets, _S. Brown_, xxxviii, 118.
---- of oil of sassafras, remarkable, _A. A. Hayes_, xx, 128.
---- of water, light from, xxvi, 178.
Cuba, coal mines in, _J. H. Blake_, xlii, 388.
----, fossils of, supposed to be oolitic, _J. Lea_, xl, 41.
----, meteorological observations in, _J. H. Blake_, xlii, 292.
Culmites, vii, 180.
Cummingtonite, named and described, _C. Dewey_, viii, 59.
----, locality in Massachusetts, viii, 233; ix, 43, 54.
_Cunningham, R._, obituary notice of, xxxii, 215.
Cupellation, new method of, _W. W. Mather_, xxxv, 321.
----, a mode of, _G. Engelmann_, xlii, 394.
Currents in water, remarks on the causes of, _A. W. Carson_,
xxix, 340.^f
---- ----, a fact relating to, _C. Rumker_, xx, 180.
---- ----, evidences of them over the surface of the earth, xi, 100.
----, oceanic, v, 132.
----, ----, and temperature, xxv, 130.
----, ----, from the north polar regions in the Atlantic,
_Wm. C. Redfield_, xxxii, 349; xlviii, 373.^f
----, ----, ibid, ice boulders and pebbles, transported by, xxxii, 351;
xlviii, 373.^f
----, ----, ibid, influence of, on the Gulf Stream, _W. C. Redfield_,
xlviii, 381.
----, ----, Gulf Stream, its limits and relation to the north polar
current, _W. C. Redfield_, xxxii, 349; xlviii, 381.
----, ----, of the Atlantic, iv, 390.
----, ----, ----, _W. C. Redfield_, xlv, 295.
----, ----, ----, causes of, and influence in producing the sedimentary
rocks of the United States, _W. W. Mather_, xlix, 1.
----, of the Southern and Pacific oceans, xlv, 299.
----, atmospheric, see _Winds_.
_Curtis, M. A._, new and rare plants of N. Carolina, xliv, 80.
----, botanical labors of, xlii, 12.
Curves for arches, method of describing, _J. Thomson_, xxiv, 73.^f
----, of conic sections, instruments for drawing, xv, 368.^f
----, of tri-section, _W. Allen_, iv, 343.^f
Cuscutineæ, monograph of North American, _G. Engelmann_, xliii, 333^f;
xlv, 73.^f
_Cutbush, J._, on the formation of cyanogen, vi, 149.
----, on the composition and properties of the Chinese fire, and on the
so-called brilliant fires, vii, 118.
----, an improvement in the electrical lamp, ii, 332.
----, on the Greek fire, vi, 302.
_Cuvier, G._, essay of, on the theory of the earth, noticed, i, 68.
----, on the freshwater formations of Paris and Rome, vi, 381.
----, memoir of, by _A. De Candolle_, xxiii, 303.
----, statue of, at Montbeliard, xxx, 184.
Cuyahoga, falls of, xxxi, 45.^f
Cyanhydric acid (or prussic,) _Magendie_ on, ii, 81.
---- ----, memoir on, by _B. L. Oliver_, iii, 182.
---- ----, ----, by _M. Orfila_, xviii, 157.
---- ----, apparatus for the evolution of, _R. Hare_, xxix, 244.^f
---- ----, extraordinary production of, _A. A. Hayes_, xviii, 201.
---- ----, preservation of, xvi, 260.
---- ----, effect of muriatic and sulphuric acids on, xviii, 146.
---- ----, cases in which administered, iii, 187.
---- ----, efficacy in asthma, vi, 366.
---- ----, effects of, on a horse, xii, 385.
---- ----, effects of, on vegetation, x, 190.
---- ----, chlorine an antidote for, xvii, 174; xxi, 157.
Cyanic acid, xvi, 258.
Cyanide of gold, a new, xlviii, 191.
----, of potassium, xviii, 329.
----, ----, preparation of, _Liebig_, xlvi, 202.
Cyanobenzoyle, xxvi, 273.
Cyanogen, formation of, _Dr. Cutbush_, vi, 149.
----, perchloride of, xvi, 257.
----, compounds of, _W. H. Ellet_, xviii, 329.
----, sulphuret of, xix, 378.
----, remarks on, xlvii, 192.
Cyathocrinites pyriformis, xlviii, 314.^f
D.
_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.