effigies, principally in Wisconsin, xxxiv, 88.^f
----, model of the southern coalfield of Pennsylvania, xli, 80.^f
_Taylor, Steuben_, localities of minerals, vi, 245.
----, account of a rocking stone, vii, 201.
----, localities of minerals, vii, 253; viii, 225.
_Taylor, Stephen_, on salt in Virginia, xli, 214.
_Taylor, S_., ancient mounds and other remains in Iowa and Wisconsin,
xliv, 21.^f
_Taylor, W. C._, on change of population in New Zealand, xxxv, 315.
Taylor's theorem, _C. Bonnycastle_ on, xl, 42.
---- ----, new investigation of, _T. Strong_, xlv, 272.
_Tchihatcheff, P. de_, memoir on the geological constitution of the
Altai, noticed, xlix, 378.
Tea, composition of, _E. Peligot_, xlviii, 187.
---- plant of Upper Assam, _W. Griffith_, xl, 165.
---- in Brazil, iv, 377.
----, cultivation of, in Brazil, and on its introduction into France,
_Guillemin_, xl, 167.
----, green, of commerce, observations on, _R. Warrington_, xlviii, 188.
Teahills of China, excursion to, xxxi, 194.
_Teale, T. P._, on the vermiform filaments of Actiniæ, xxxv, 311.
Technological Institutes, xii, 197.
Technology, Elements of, xvii, 198.
Teeth, phosphate of lime in, xxviii, 386.
----, _R. Owen_ on fossil, xxxv, 307; xxxviii, 127.
----, on the microscopic structure of, xxxviii, 134.
---- of the Lepidostei, on the microscopic structure of, _J. Wyman_,
xlv, 359.^f
---- of shark, New Jersey, fossil, xxviii, 378.^f
----, see farther under _Fossil_.
Telegraph, Pearson's, iv, 314.^f
----, system for the United States, proposed, xxxii, 201.
----, Morse's electro-magnetic, xxxiii, 185.^f
----, ---- ----, experiments with, xlv, 390.^f
Telescope, notice of Barlow's refracting, xvii, 367.
----, Leon Lewenberg's, xxxviii, 379.
----, Rosse's, xlvi, 208; xlix, 221.
----, achromatic, Cauchoix's, xxii, 358.
----, improvements in, by J. Frauenhofer, xvi, 307.
----, notice of Holcomb's, xxiii, 403; xxvii, 185.
----, superior, of Lerebours, xvi, 302.
----, fourteen feet reflector, xxxv, 174.
----, improvement in, _H. F. Talbot_, xliv, 166.
----, on determining distances by means of, xlii, 164.
Tellurium, _J. J. Berzelius_ on, xxviii, 137.
----, in Connecticut, i, 312, 316; vi, 235.
----, an astronomical machine, _E. C. Leedom_, xlii, 338.^f
Temperament, musical, _A. M. Fisher_, i, 9^f, 176.^f
----, ----, _Jno. Farey_, ii, 65.
Temperance, _Oliver's_ address on, xxiv, 190.
Temperature, disinfecting powers of increased, _W. Henry_, xxi, 392;
xxii, 111.^f
----, effect of clearing land on, xlvii, 237.
----, ---- of mountains on, in the winter, xlii, 159.
----, ---- of, on the distribution of fossils, _T. A. Conrad_,
xxxv, 239.
----, ---- of, on geography of plants, _S. Forry_, xlvii, 221.
---- limiting the distribution of corals, _J. D. Dana_, xlv, 310.
----, ibid, remarks on, _W. C. Redfield_, xlv, 311.
----, in different geological epochs, xxxv, 240.
---- of different heights, _W. C. Redfield_, xxxiii, 52.
----, on the methods of ascertaining the mean, _W. M. Carpenter_,
xliv, 50.
---- of October, not the mean temperature of the year, xxv, 260.
----, month giving mean annual, xlvii, 223.
---- of the planetary space, xix, 377; xxxii, 1.
---- of the earth, and of space, _Fourier_, xxxii, 1.
----, ibid, _S. D. Poisson_, xxxiv, 157.
---- of the terrestrial globe, xxvi, 10; xxxii, 1.
---- of the earth at different depths, remarks on, xxiii, 14; xxxiv, 36;
xxxv, 293; xliii, 176.
---- ----, in deep mines, xxxv, 297; xl, 333.
---- ---- increasing with the depth, early experiments upon, by
_Joel Lean_, xl, 332.
---- ---- at different depths, near Madgeburg, xxxvi, 203.
---- ----, interior of, _R. Patterson_, xxxvii, 357.
---- ----, variations of internal, producing elevations and depressions
in the earth's crust, _C. Babbage_, xxvii, 408.
---- ----, oscillations of annual, extinguished at different depths
in different rocks, xxxviii, 109.
----, supposed difference of, between the air and the earth,
_W. M. Carpenter_, xliv, 50.
---- of elevation, xxv, 123; xxxiii, 52.
---- of wells and springs, xxxv, 379.
---- ---- in New York, xxxvi, 25.
---- ----, xv, 190; xli, 316; xlix, 272.
---- of the ocean, v, 129; xxv, 130.
---- of the sea at great depths, from Péron's voyage, xvii, 295.
---- ----, ibid, remarks on, xviii, 191.
---- ----, table of Forster's observations, xvii, 299.
---- ----, table of Irving's observations, xvii, 299.
---- ----, ----, xxiii, 10.
---- ---- at depths, by _Scoresby_ and _Buchan_, xlv, 139, 140.
----, extreme cold, extraordinary seasons of, _N. Webster_, xxviii, 183.
---- of the ground in Siberia, _M. Erman, Jr_., xxxvi, 205.
---- in Europe, of wells at St. André, xxxvi, 204.
---- ----, of the cities of Rome, (Italy) and New York,
_J. Van Rensselaer_, xlii, 120.
---- ----, of a cavern near Montpelier, xxxvii, 73.
---- ----, at Perth, Scotland, mean annual, xl, 342.
---- ----, mean, of Inverness, xliv, 158.
---- ----, ----, of Plymouth, England, xxxiv, 20.
---- ----, cold, of winter of 1837, 8, in England, _J. Lindley_,
xxxix, 18.
---- ----, of Malvern, in Worcestershire, _Addison_, xxxviii, 102.
---- ----, of the air in York Minster, xlii, 161.
---- ----, excessively hot, of July, 1825, in England and France,
xi, 195.
---- of the eastern and western continents compared and explained,
_S. Forry_, xlvii, 38.
---- of the United States, connection of, with the lakes and ocean,
_S. Forry_, xlvii, 21, 23.
---- ----, isothermal, isotheral and isocheimal lines of, in America
and Europe, _S. Forry_, xlvii, 18.^f
---- ----, on the forwardness of the spring in different parts,
_J. Bigelow_, i, 76.
---- ----, cold extreme of the winter of 1825, 6, x, 399.
---- ----, ---- ---- of January, 1835, at different places in,
xxviii, 177.
---- ----, heat extreme in 1824, in the Southern States, ix, 395.
---- ----, ---- ---- of the summer of 1825, various observations upon,
x, 296, 297.
---- ----, mean, of the state of New York, in 1832, xxv, 259.
---- ----, ----, ibid, xlix, 179.
---- ----, mean, of Albany, N. Y., xxv, 260.
---- of the United States, extreme cold at Plattsburgh, N.Y.,
(1821) iii, 366;
(1826) xi, 195.
---- ----, subterranean, in the mines of eastern Virginia,
_W. B. Rogers_, xliii, 176.
---- ----, of the year 1839, as deduced from observations at
Amherst College, _E. S. Snell_, xxxix, 36.^f
---- ----, mean, at Salem, Massachusetts, and Rome, in Italy, for
thirty-three years ending in 1818, vi, 386.
---- ----, ----, at Marietta, Ohio, see _S. P. Hildreth's_
meteorological registers.
---- ----, extreme heat, at Cumberland, Md., July, 1838, xxxv, 190.
---- ----, observations at Hudson, Ohio, 1838-1840, _E. Loomis_,
xli, 315.
---- ----, ---- ----, 1841-1844, _E. Loomis_, xlix, 271.
---- ----, cold on Lake Superior, ix, 395.
---- ----, of Lake Ontario, _C. Dewey_, xxxiii, 403; xxxvii, 242.
---- ----, of the Saco river, _J. M. Batchelder_, xxxiv, 381.
---- ----, relative, of the water of the Saco river, and the atmosphere
for the years 1837 and 1838, _J. M. Batchelder_, xxxvii, 389.
---- ----, of wells at Hudson, Ohio, _E. Loomis_, xli, 316; xlix, 272.
---- ----, ----, New York state, xxxvi, 25.
---- ----, ----, _M. Field_, xv, 190.
---- register at Montreal, 1836-40, _J. S. McCord_, xli, 330.
---- of Colombia, and of the Pacific coast of S. America, _R. Wright_,
xxxvii, 1.
----, mean, at Rio Janeiro, for 1832 to 1843, _J. Gardner_, xlvii, 291.
---- of air, see farther _Meteorological_.
Tempering of metallic wires and springs, xx, 393.
Temple of Jupiter Ammon, iii, 378.
---- of Serapis, changes of level in, _C. Babbage_, xxvii, 408.
_Ten Eyck_, account of a large electro-magnet, xx, 201.
Tennantite, _Hemming_, xxvi, 386.
Tennessee, geology of eastern, &c., i, 60, 214.
---- meteorite, fall of, at Nashville, xv, 358; xviii, 378.
---- ----, account of, xvii, 326; xviii, 200.
----, meteoric iron, _G. Troost_, xxxviii, 250; xlix, 336.^f
----, ---- ----, analysis, _C. U. Shepard_, xliii, 354.
---- gold region, xxiii, 1.^f
----, Geological Report of, xxx, 391; xxxiv, 187.
----, mounds and caves in eastern, _J. H. Kain_, i, 428.
Tenorite, xlviii, 219.
Tephroite, xviii, 391.
Teratology, a French treatise on the elements of, noticed, xli, 374.
Terraces of the Connecticut valley, xxii, 214; xlvii, 98.
---- of the river Malbay, Lower Canada, v, 221.
---- of the Canadian Lakes, xlvi, 314.
---- of Lake Ontario, xxxv, 89; xxxvi, 40.
---- of Lake Huron, iii, 257.
---- of the Bay of Funda, xli, 55.
Terrestrial meridian, length of a degree of, xxxi, 222.^f
Tertiary of the Middle Rhine, _R. I. Murchison_ on, xlvii, 183.
---- of Cephalonia, _Hamilton_ and _Strickland_, xxxiii, 211.
---- formations in North America, essay on, by _J. Finch_, vii, 31.
---- of the Atlantic coast, United States, _T. A. Conrad_, xxviii,
104, 280.^f
---- epoch, elevation during, in the United States and California,
xxxv, 245.
---- of Massachusetts, xxii, 36.
---- ----, of Martha's Vineyard, vii, 240^f; xxii, 36; xlvi, 318.
----, Hudson river formations, _J. Finch_, x, 227.
---- of Lake Champlain, xxxvi, 27.
---- of Ohio, xxxiv, 360.
---- formations of Virginia, _W. B._ and _H. D. Rogers_, xxxviii, 182.
---- of North Carolina, _D. Olmsted_, xiv, 231.
---- of the southern Atlantic states, _J. T. Hodge_, xli, 332.
---- shells of the United States, description of, _T. A. Conrad_,
xxiii, 204, 339; xxviii, 109; xli, 344.^f
---- ---- ----, _I. Lea_, xxv, 413.
---- ---- ----, notice of, _E. Hitchcock_, xli, 246.
---- ---- ----, _H. D. Rogers_, xlvii, 254.
---- ----, remarks on a list of, _J. T. Hodge_, xli, 332, 343.
---- ---- of Maryland, list of, _I. Lea_, xxv, 422.
---- ---- from North Carolina, xxxix, 387.
---- ---- of Alabama, list of, _I. Lea_, xxv, 419.
---- ---- of the United States, mostly from Alabama, _H. C. Lea_,
xl, 92.^f
---- infusoria, Virginia, xli, 214.
---- fossils, _Cuvier_ and _Brongniart_ on Deshayes' work on,
xxiii, 196.
_Teschemacher, E. F._, analyses of guano, xlviii, 181.
_Teschemacher, J. E._, on the identity of pyrochlore with microlite,
xliii, 33.
----, reply of C. U. Shepard to, xliii, 116.
----, remarks on uranium and pyrochlore, in reply to C. U. Shepard,
xlviii, 395.
----, on the Elvella esculenta, xxxviii, 194.
----, on the minerals found at Charlestown, Mass., xxxviii, 194.
----, on plants from Blackstone river, xxxviii, 195.
----, on the Andromeda mariana, xxxviii, 196.
----, on fossil coals and madrepores, xxxviii, 197.
----, address by, before the Boston Society of Natural History,
xli, 370.
----, on singular crystals of galena from Rossie, N. Y., xlvii, 417.
----, on the blowpipe characters of pyrrhite, xlvii, 418.
----, on the palatal tooth of the Ptychodus polygyrus, xxxvi, 380.
----, remarks on the origin of guano, xlvi, 203.
----, on the identity of Lincolnite and Heulandite, xlviii, 65.
Test for alkalies, flowers of the common mallows, a good, vii, 194.
---- liquor, the blue iris affords a good, v, 408.
---- paper of purple cabbage, xxvi, 210.
Tests for arsenic, see _Arsenic_.
Testacea, economical notice of some species of, xxxii, 53, 235.
----, see farther under ZOOLOGY, _Mollusca_.
Tetracaulodon, _R. Harlan_, xliii, 141.
----, xlv, 210.
----, _R. Owen_, xliv, 342.
Texas, lignite of, xxxvii, 216.
----, silicified wood of, xxxvii, 215.
----, hog-wallow prairies, notice of, xxxix, 211.
Thebaine, from opium, xxx, 379.
_Thenard, L. J._, system of Chemistry of, notice of, xx, 94.
_Thenard, P._, on the combinations of phosphorus and hydrogen,
xlviii, 184.
----, on phosphuret of lime, xlix, 193.
Theodolite, Hassler's repeating, xvi, 252.^f
Theory of the universe, _P. E. Morin_, xxxi, 160.
---- of a resisting medium, examination of, xxxiii, 1.
Thermal spring, see _Spring_.
Thermo-electricity, xxv, 271; xxx, 181.
Thermo-electrical battery, _J. Locke_, xxvi, 214.
---- experiments on metals, _J. Locke_, xxvi, 381.
---- piles of Nobili, new, xxviii, 397.
Thermo-magnetism, a law of, regarding metals unequally heated, &c.,
_J. P. Emmet_, xxvi, 311.
Thermo-multiplier, _Nobili_ and _Melloni_, xxii, 370; xxiii, 185.
----, effects of, _M. Melloni_, xxiii, 381.
Thermometer, when invented, ii, 359.
----, theory of the construction of, _J. Adams_, viii, 121.
----, a new mode of graduating, _Skene_, xii, 397.
----, American manufactures of, vi, 371.
----, employed in finding the heights of mountains, xliv, 12.
----, or apparatus for measuring the expansion of solid bodies,
_W. W. Mather_, xxx, 324.^f
----, differential, _W. Howard_, ii, 327.^f
Thermometric observations on solar and terrestrial radiation, at
Montreal, 1838, _J. S. McCord_, xxxvi, 180, 182.
---- ----, see farther under _Temperature_ and _Meteorological_.
Thermopsis caroliniana, xliv, 80.
---- fraxinifolia, xliv, 81.
Thermoscope, new, xxii, 370.
Thermoscopic galvanometer, xxii, 370; xxxiii, 365.
Thetford, Vermont, copperas factory near, iii, 326.
_Thilorier_, liquid carbonic acid, xxxi, 402.
----, solidification of carbonic acid, xxxi, 163, 404.
Thimbles, manufactory of, in France, iii, 375.
Thomaite, a new mineral, xlix, 393.
_Thomas, D._, dip of the rocks in western New York, xviii, 375.
----, on coal formations in New York, xix, 326.
----, on physical climate, xix, 361.
----, Chrysomela vitivora, xxvi, 113.^f
----, on the American locust, xxi, 188.
----, specific characters of two species of Corydalis, xxvi, 114.^f
----, description of a new Ulmus, xix, 170.^f
----, on a new species of Liatris, xxxvii, 338.^f
----, on frogs and toads in rocks, xix, 167.
_Thomas, E._, improvements in the microscope, xix, 57.^f
----, improvements in the achromatic microscope, xx, 265.^f
----, obituary notice of, xxii, 380.
_Thomas, J._, transmission of galvanic light through metals of different
conducting powers, xxxiv, 205.^f
_Thompson, W. A._, facts relating to diluvial action, xxiii, 243.
----, account of marks on graywacke, xx, 124.
----, on the vitality of toads confined, xxv, 41.
_Thomson, Sir Benjamin_, obituary notice of, xix, 28;
xxxiii, 21.
_Thomson, C._, grave of, xxxv, 389.
_Thomson, J._, elevation of rails for roads of certain curvature,
xxii, 346.^f
----, on inclined planes in the construction of railroads, xxiii, 107.
----, method of describing curves for arches, xxiv, 73.^f
_Thomson, J. B._, Elements of Geometry, by, noticed, xlviii, 210.
_Thomson, R. D._, on action of emulsin on amygdalin, xxxv, 302.
----, British annual of, noticed, xxxvii, 400.
----, on Parietin, xlix, 195.
----, Records of Science, noticed, xxviii, 365; xxxii, 212.
_Thomson, T._, native diarseniate of lead, xxxv, 297.
----, on diabetic sugar, xxxv, 298.
----, on galactin, xxxv, 303.
----, on cast iron, xxxiv, 21.
----, foreign substances in iron, xxxv, 302.
----, First Principles of Chemistry of, noticed, x, 162.
----, on light and heat, xx, 93.
----, Chemistry of Organic Bodies, noticed, xxxvi, 202.
----, on the non-existence of zirconia in Sillimanite, xlviii, 219.
----, analysis of Sillimanite, xlix, 396.
----, analysis of anthophyllite, xix, 359.
----, scientific medals of, xviii, 198.
Thomsonite, in New Jersey, xl, 69; xliv, 54.
----, in Nova Scotia, xxx, 345.
Thorium, a new metal, xvii, 381.
Thorn fence, x, 167.
Thracia, see ZOOLOGY, _Mollusca_.
Thrombolite, xlii, 386.
Thunder storms, see under _Wind_.
_Thury, H. de_, on springs and fountains, xviii, 267.^f
Thylacotherium, xxxvii, 228.
_Tiarks, J. L._, on the northern boundary of the Lake of the Woods,
xv, 41.
_Ticknor, G._, letter to, from Baron von Waltershausen, xlvii, 100.
Ticonderoga, walls of, iv, 49.
Tides, atmospheric, Bombay, xxxiii, 274.
---- of the ocean, remarks on, v, 133.
----, remarks on, _W. C. Redfield_, xxv, 132; xxviii, 311; xlv, 294.
----, theory of, with observations at London and Liverpool,
_J. W. Lubbock_, xxxi, 333.
----, _W. Whewell_ on, xxxi, 335, 362; xxxv, 290.
----, connection with the weather, _G. W. Hall_, xxxi, 371.
----, results mapped out by means of curves, _W. Whewell_, xxxv, 290.
---- wave, circuit character of, _W. C. Redfield_, xxviii, 313.
---- and tidal wave of the Atlantic and Pacific, _W. C. Redfield_,
xlv, 294.
---- of the Society Islands anomalous, _W. C. Redfield_, xxviii, 311.
---- ---- ----, ----, xxxiv, 83.
----, observations on the coast survey, xlix, 240.
----, remarks on, _D. Tomlinson_, xxxiv, 81.
----, rise and fall of, vanishes at a central space in the German Ocean,
xlii, 158.
---- at Arbroath, remarkable, xlvi, 395.
----, of Mount's Bay, Cornwall, xlvi, 396.
---- observations made at Bristol and Leith, xlii, 150.
---- of London and Liverpool, xxxi, 333.
---- of Cape Cod, xxxiv, 393.
----, supposed, in the North American Lakes, remarks on, _H. Whiting_,
xx, 205.
----, ----, ---- ----, _H. A. S. Dearborn_, xvi, 78.^f
----, ----, ---- ----, _D. Ruggles_, xlv, 18.
----, ----, in Lake Superior, _H. R. Schoolcraft_, xx, 213.
Tilgate forest, birds in the strata of, xxix, 362.
Timber, growth of, _A. C. Twining_, xxiv, 391.
----, seasoning of, xii, 163.
----, proper season for cutting, xxxiv, 169.
----, rotting of, in certain situations, xxxii, 380.
----, preserved by pyrolignite of iron, xl, 213.
Tin, purity of, xv, 178.
----, crystallization of, xvii, 206.
----, crystallized from solution, _W. W. Mather_, xxvii, 254.
----, action of metallic, on solutions of muriate of, _A. A. Hayes_,
xxxviii, 408.
----, method of separating from antimony, xxvii, 197.
----, alloy of, with bismuth and lead, xxi, 371, 375.
----, ----, with antimony, the action of muriatic and nitric acids on,
xlix, 206.
---- ore at Goshen, Mass., xvi, 188; xxii, 62.
---- ----, in New Hampshire, _C. T. Jackson_, xliii, 168; xlix, 34.
---- ----, in Virginia, xliii, 168.
Tinned lead pipes, xxvi, 210, 400.
Tioga coal, xiii, 32, 381.
Titaniferous iron ore, near Baltimore, _T. G. Clemson_, xvii, 42.
---- ---- ----, _P. Berliner_, xxiv, 375.
Titanium, metallic, vii, 192.
----, volatility of, _Zinken_, xxviii, 136.
----, crystals of, in the furnaces of Baden, xii, 189.
---- in scoria, _Wollaston's_ mode of detecting, xix, 188.
---- in rocks, xxviii, 136.
---- ores, in Connecticut, iv, 55.
---- ----, in Greece, xxxi, 175.
---- ----, of Massachusetts, i, 116, 134; vi, 24.
---- ----, in Vermont, iv, 276; vi, 24.
---- ----, in Virginia, ii, 143.
---- ----, in S. Carolina, iii, 228.
Tithonometer, _J. W. Draper_, xlvi, 217.^f
Toad, poison of the common, xiv, 373.
----, living in rocks, _A. Eaton_, xv, 247.
----, in stone or wood, _W. Buckland_, xxiii, 272.
----, vitality of, in rocks, _W. A. Thompson_, xxv, 41.
----, in sandstone at Park Gardens, Coventry, xxix, 353.
Tobacco, chemical experiments on, _C. C. Conwell_, xvii, 369.
----, a remedy for arsenic, xxxi, 188.
----, E. Wright's lecture on the use of, alluded to, xxiv, 190.
Toby, Mount, geology of, vi, 8.
----, ----, Mass., scenery of, vii, 10.
_Tolefree, R._, the voice and its modifications, xxvi, 76.
Tom, Mount, Massachusetts, rests on sandstone, i, 109.
----, ----, height of, and geological structure, vi, 45.
----, ----, scenery of, vii, 9.
Tomatos, acid in, xvii, 115.
Tombacite, xlii, 387.
_Tomlinson, D._, on the tides, xxxiv, 81.
----, on preserving animal fat for soap making, xxxvii, 194.
Tongueless dog, retaining the power to bark, xxxvi, 194.
Tonsil, concretion from, vi, 165.
Topaz, powder of, used as emery, xxxiv, 381.
----, distribution of coloring matter in crystals, and optical
properties of, _D. Brewster_, vii, 364.
---- in Ireland, xxix, 374.
---- of Huntington, Ct., x, 352; xi, 192; xii, 158^f; xiv, 229.
---- in Connecticut, at Middletown, _C. U. Shepard_, xxxiv, 324.
---- in the While Mountains, xx, 410.
---- ----, analysis of, x, 352.
Tornado, see under _Wind_.
Toronto picture gallery, xxvii, 178.
Torpedo, experiments on, _Dr. Davy_, xxv, 187.
----, electricity of, xxxii, 198.
----, new species of, _D. H. Storer_, xliv, 213; xlv, 165.^f
Torpedoes of fulminating silver, i, 169.
Torrelite, _J. Renwick_, viii, 192.
---- of Thomson identical with Columbite, _J. D. Dana_, xxxii, 149.^f
_Torrey, John_, on the condensation of carbonic, sulphurous and
chloro-chromic acid gases, xxxv, 374; xxxvi, 394.^f
----, on staurotide, i, 435.
----, on siderographite, ii, 176.
----, on an ore of zinc at Ancram, N. Y., v, 235.
----, notice of plants collected by D. B. Douglass, around the Great
Lakes and the head waters of the Mississippi, iv, 56.
----, number of indigenous plants of New York state, xl, 77.
----, description of the Usnea acharius, vi, 104.^f
----, Flora, of the Northern and Middle States, notice of, vii, 178;
viii, 192; xii, 179.
----, on West Point minerals, ix, 402.
----, and _A. Gray_, Flora of North America of, noticed, xxxv, 180;
xxxix, 198; xli, 275; xliv, 420.
_Torrey, Joseph_, proposed reform of orthography, xxxix, 197.
Tortoise, fossil, xvii, 290.
----, a new freshwater, _R. Harlan_, xxxi, 382.^f
_Totten, J. G._, descriptions of some shells of the coast of New
England, xxvi, 366^f; xxviii, 347.^f
Touchwood, xxi, 163.
Tourmaline, electricity of, xvi, 390;
xviii, 301.
----, to detect boracic acid in, vi, 157.
----, analysis of, xiv, 384.
----, analyses of varieties of, xv, 389.
---- in Canada, viii, 61.
---- in Connecticut, i, 353; ii, 142, 205, 239, 240; vi, 220, 246;
x, 206; xiv, 229; xviii, 361.
---- in Delaware, xiv, 11.
---- in Maine, x, 15; xviii, 293, 299.^f
---- in Maryland, v, 256; xiv, 12; xviii, 78.
---- in Massachusetts, i, 114, 343, 346; iv, 55; vii, 55; viii, 42, 233;
ix, 42; x, 18, 214; xii, 259; xiv, 215, 219.
---- in New Hampshire, xxxiv, 107, 204.
---- in New Jersey, ix, 245.
---- in New York, i, 237; ii, 366; iv, 37; xix, 223, 225, 227; xxv, 349.
---- in North Carolina, v, 263.
---- in Pennsylvania, ix, 45; x, 221, 222; xiv, 5, 8, 12, 14.
---- in Rhode Island, ix, 46.
---- in Vermont, i, 114; iii, 76; v, 271.
---- in Virginia, v, 263.
---- of Chesterfield, for sale, xiv, 400.
Tower of Babel, ruins of, xxxvii, 352.
_Town, Ithiel_, new mode of bridge-building, iii, 158.^f
Town's bridges, xxxviii, 276.^f
_Townsend, J. K._, on the ornithology of the United States, xxxvi, 201.
_Townsend, P. S._, titles of memoirs read before the New York Lyceum,
ii, 339, 371.
Toxodon of Patagonia, _R. Owen_, xxxiii, 208; xxxv, 196.
Trachyte, varieties of, xiii, 249; xv, 32.
---- at the Azores, iv, 259.
Tracks, see _Footprints_.
Tract Society of Paris, v, 383.
_Tracy, C._, on the rotary action of storms, xiv, 65.^f
----, on the oil of Indian corn, xliii, 403.
Trade, statistics of, between Great Britain and the United States,
xxxiii, 277.
---- winds, remarks on, _W. C. Redfield_, xxv, 124; xxxiii, 61.
_Traill, T. S._, Russian vapor bath, xxiii, 295.
----, on the preservation of animals, xv, 167.
Transactions, notice of, see _Society_.
Transit of Mercury, May, 1845, _D. Olmsted_, xlix, 142.
Transition epoch, nature of organic life during, xxxvi, 12.
----, fossils characteristic of, _T. A. Conrad_, xxxv, 246.
---- rocks of the Cataraqui, xviii, 85; xx, 74^f; xxiv, 97^f;
xxx, 233.^f
Transpiration of half the body, xxxix, 400.
Transplanting of trees, xxii, 383.
Transylvania, volcanic character of, xiii, 251.