Oolitic formation in America, xl, 41.
---- ---- in New York, Orange Co., xix, 398.
---- ---- ----, in Saratoga Co., _J. H. Steele_, ix, 16.^f
---- ---- in Ohio, xlii, 233.
---- fossils, remarks on, xxxiii, 107.
Oology, notice of _W. Hewitson's_ work on, xxxvii, 166.
Opal at Vienna, a large, xii, 384.
---- from the graphite mine of Pfaffenreith, one-third water, xv, 390.
Opelousas, geological notice of xxxv, 344.
Ophisaurus ventralis, i, 262.
Opiamon, xlix, 205.
Opianic acid, xlvii, 196; xlix, 205.
Opiano-sulphurous acid, xlix, 205.
Opium, constitution of, xxviii, 359.
----, mode of detecting minute quantities of, _R. Hare_, xii, 290.
----, observations and experiments on, _G. W. Carpenter_, xiii, 17.
----, English, viii, 389; x, 194.
----, paramorphine in, xxiv, 374.
----, thebaine in, xxx, 379.
Opossum, remains in the Stonesfield slate, xxvii, 412; xxxvii, 228.
Optics, notice of _D. Brewster's_ Treatise on, xxiv, 389.
Optical amusements, xvi, 398.
---- experiment, exhibiting the blood vessels of the eye, xxi, 166.
---- deception, instrument for exhibiting a certain, _E. S. Snell_,
xxvii, 310.
---- instruments, xix, 390.
---- properties of saccharine juice, _Biot_, xxiv, 379.
---- structure of minerals, notice of, ix, 384.
---- surgery, xviii, 179.
---- trap, v, 200.
Orang Outang, account of, xv, 161.
Orange County of New York, natural history of, _J. Van Rensselaer_,
xiii, 224.
----, mineral notices of, _C. U. Shepard_, xxi, 321.^f
----, ---- ----, _J. Fowler_, ix, 242.
Orangeries, v, 190.
Orchis tribe, synonymy of some species of, _A. Gray_, xxxviii, 306.
---- spectabilis, monstrous flower of, _J. W. Bailey_, xxxv, 117.^f
_Ordinaire, J. J._, method of teaching Latin used by, v, 182; vii, 383.
----, on public instruction, vii, 199, 383.
Oregon, fossil bones from, _H. C. Perkins_, xlii, 136.^f
----, fossil bones from, orycterotherium, &c., _R. Harlan_, xliv, 79.
----, geological and miscellaneous remarks on, _J. Ball_, xxviii, 1.
----, climate of, and a meteorological register kept at Fort Vancouver,
1832, 1833, J. Ball, xxviii, 8.
Orenburg, salt steppe of, xliv, 205.
Orford brown tourmaline, xxxiv, 204.
Organic remains, see _Fossil_.
_Oriani, B._, death of, xxv, 186.
Orientals, style of, v, 181.
Oriental minerals, _F. Hall_, xxxiii, 249.
Ornithichnites, see _Footprints_.
Ornithological terms, improved, xxi, 162.
Ornithology, work on, by _T. Nuttall_, noticed, xx, 154; xxii, 178;
xxv, 424.
----, see farther under _Zoology_.
_Orr, I._, on the process of memory, xxiii, 278.
----, on the formation of the universe, vi, 128.^f
----, on infinites, v, 326.
----, mathematical propositions by, xxiv, 395.
Orthite, ix, 376.
Orthocerata, see ZOOLOGY, _Mollusca_.
Orthography, English, proposals for improving, xxxix, 197.
Orycterotherium, xlii, 136^f, 392; xliv, 69^f; xlv, 210.
---- Missouriense, xliv, 69^f; xlv, 210.
---- Origonense, xlii, 136^f; xliv, 79.
_Osborn, M. W._ and _N. S._, on a vibrating dam, xliv, 366.
_Osler, F._, on indications of his anemometer, xxxviii, 103.
Osmelite, xv, 388.
Osmium, atomic weight and compounds of, _E. Fremy_, xlix, 199.
----, method of obtaining, from the platinum residue, _F. Wöhler_,
xxvi, 371.
----, means of obtaining pure, _E. Fremy_, xlviii, 185.
Ossification of the vitreous humor, xvii, 186.
Ostræa edulis, remarks on, xxxii, 241.
----, see farther under ZOOLOGY, _Mollusca_.
Ostrich toes, xxxv, 312.
Otaheite, letter on, by _J. A. Maerenhaut_, xxix, 283.
----, contents of _J. A. Maerenhaut's_ work on, xxix, 290.
_Otto_, on the separation of zinc from manganese, xlvii, 194.
Oval arches, tracing of, _E. Miller_, xxii, 303.^f
_Owen, D. D._, on fossil palm trees in Indiana, xlv, 336.
----, on geological coloring and symbols, xlv, 351.
----, on geological paintings and illustrations, xlv, 136.
----, geology of the Western States, xliv, 365; xlv, 151, 163.
----, report on Indiana, notice of, xxxiv, 193; xl, 133.
----, on human footprints in limestone, xliii, 14.^f
----, review of New York Geological Reports, xlvi, 143; xlvii, 354^f;
xlviii, 296.^f
----, meteorological notices in Indiana, xxix, 294.
_Owen, Richard, Wollaston_ medal, presented to, xxxv, 197.
----, on the fossil bones collected by C. Darwin, xxxv, 196.
----, structure of fossil teeth, xxxv, 307.
----, on the Megatherium, xxxvii, 371.
----, on R. Harlan's notice of new fossil mammalia, xliv, 341.
----, reply of _R. Harlan_ to, xlv, 208.
----, on the Dinornis, and the Connecticut valley fossil footprints,
xlv, 185; xlviii, 194.
----, on the bird's nests of New Holland, xlviii, 61.
----, Report on the Fossil Mammalia of Great Britain, xlvii, 186.
_Owen, Robert_, establishment at New Harmony, x, 165; xi, 188.
----, Plans of Education, &c., ix, 161, 383.
Owhyhee, see _Sandwich Islands_--also under _Geology_ and _Volcanoes_.
Oxahverite, xv, 387, [Apophyllite.]
Oxalates, experiments on certain, xiii, 188.
Oxalate of lime, crystallized in plants, xxi, 372.
Oxalic acid, _Gay Lussac_, xxvii, 400.
---- ether, new product from, _Malaguti_, xl, 215.
---- ---- and chlorine, compound of, xl, 215.
Oxygen, absorption of, by water, ii, 349.
----, abstraction of, from the atmosphere, xii, 91.
----, specific gravity of, xxxv, 298.
----, delicate test of, in a gaseous mixture, xvi, 397.
----, a means of resuscitating from drowning, xvi, 250.
----, respiration of, i, 95.
----, action of oils upon, xxiii, 190.
Oxygenized water, iii, 369.
Oxy-hydrogen blowpipe, see under _Blowpipe_.
---- - ---- illumination in light-houses, xxviii, 355.
Oxyria reniformis, xlv, 29.
Oysters, ancient and modern history of, xxxii, 211.
----, fishery of, xxxii, 245.
----, habits of, xxxii, 244.
----, uses, xxxii, 246.
Ozocerite, new mineral species, xxvi, 388.
Ozone, the cause of the electro-chemical odor, _C. F. Schönbein_,
xli, 44.
----, nature and properties of, _F. de Moleyns_, xiii, 318.
----, notice of, xlix, 195.
P.
Pachuca silver mines, xxiv, 231.
Pacific, Caroline Islands, some account of, xxviii, 115.
----, currents of, xxv, 131; xlv, 299.
Packfong, composition of, xv, 396.
Paddle fish, Ohio, xii, 201.^f
Paddle wheel and screw, propulsion of vessels by, xlii, 336.
Padua, v, 177.
Pæstum, on the stone of which the temple of, is built, xxxvii, 366.
_Page, C. G._, movements on the surface of water produced by the
vibration of glass, xxx, 192.
----, echo in Virginia, xxxvi, 174.
----, new electrical instruments, xxvi, 110.^f
----, method of increasing shocks with J. Henry's apparatus for
obtaining sparks and shocks from the calorimotor, xxxi, 137.^f
----, iron, lead and other metals, a substitute for copper in galvanic
apparatus, xxxii, 197.
----, on the use of the dynamic multiplier, xxxii, 354.^f
----, musical tones from magnets, xxxii, 396; xxxiii, 118; xlviii, 401.
----, electro-magnetic apparatus and experiments, xxxiii, 190.^f
----, ---- - ---- experiments on the application of electro-magnetism as
a moving power, xxxiii, 118, 190^f; xxxv, 106.
----, rotary multiplier, or astatic galvanometer, xxxiii, 376.^f
----, new form of electrepeter, xxxiii, 377.^f
----, new magnetic electrical machine of great power, with two parallel
horse-shoe magnets and two straight rotating armatures, with
experimental researches, xxxiv, 163.^f
----, ibid, fusion of iron filings by, xxxiv, 169.
----, compound electro-magnets for the magnetic electrical spark, shock
and decomposition, xxxiv, 364.
----, magneto-electric multiplier convertible into an electro-magnetic
engine, xxxiv, 368.^f
----, magneto-electric and electro-magnetic apparatus, xxxv, 252.^f
----, magnetic electrepeter and electrotome to be used with flat
spirals, xxxv, 112.^f
----, compound electro-magnet and electrotome, xxxv, 253.^f
----, circular galvanometers, xxxv, 259.^f
----, revolving armature machine, xxxv, 262^f; xxxvi, 350.^f
----, reciprocating armature engine, xxxv, 263.^f
----, vibrating armature engine, xxxv, 267.^f
----, double helix for inducing magnetism, xxxv, 261.^f
----, on the benefit of fresh immersion in galvanic batteries,
xxxvi, 137.^f
----, the galvanoscope, a means of detecting the failure of water in
steam boilers, xxxvi, 141.^f
----, observations on electricity, xxxvi, 353.
----, magneto-electric multiplier, xxxvii, 275.^f
----, an improved form of Saxton's magneto-electric machine,
xlviii, 392.
----, new electro-magnetic machine, xlix, 131.^f
----, new axial galvanometer, xlix, 136.^f
----, double axial reciprocating engine, xlix, 139.^f
----, entomological cabinet of, for sale, xxxix, 211.
----, mode of preserving Lepidoptera, xlvii, 131.
_Paine, M._, Medical Commentaries, notice of, xxxix, 209.
_Paine, R. T._, on barometric minima of Feb. 16-19, 1842, xlii, 403.
----, on the solar eclipse of July 8, 1842, xlii, 175.
Paint, fine scarlet, for the pallet, xvi, 174.
----, a new green, for artists, xxviii, 148.
----, use of alumina with, for the pallet, xvi, 173.
---- Rock, Virginia, i, 67.
Painting in fresco, means of detaching, iv, 384.
---- on ivory, color of carmine, how produced by red lead, xxvi, 74.
---- of a Parthian archer, by D. Scott, xlii, 215.
---- of porcelain, iii, 217.
---- of the Declaration of Independence, by Col. Trumbull, i, 200.
Paintings, historical, by J. Trumbull, xvi, 163.
----, Trumbull Gallery of, at Yale College, xxxix, 213.^f
----, transparent, by Kœnig, ii, 348.
----, remarks on colors for, xxvi, 74, 75.
Palæonisci found in New Jersey, xliv, 135.
Palæontology, _W. Whewell's_ remarks on, xxxvii, 227.
Palæozoic rocks, classification and nomenclature of, _H. D._ and
_W. B. Rogers_, xlvii, 111, 154.
Palermo, iii, 396.
Palestine, on minerals from, _F. Hall_, ix, 337.
----, ----, _I. Bird_, x, 21.
----, various facts relating to, _I. Bird_, xii, 145.
----, notices of, in a letter by _I. Bird_, xv, 374.
----, climate of, xxxi, 183.
----, account of, _J. D. Sherwood_, xlviii, 2.
Palisades, ii, 182.
Palms, _C. F. P. von Martius_ on, noticed, viii, 383.
Palm trees, fossil, Indiana, _D. D. Owen_, xlv, 336.
----, seed of, Mariner's Mill, Ohio, xxxi, 28.^f
----, leaf of, Ohio, xxxi, 35.^f
Palmacites, fossil plants, generic characters of, vii, 182.
Palmetto, used as food in Florida, xxxv, 59.
Paludina, see Zoology, _Mollusca_.
Pantology, of _R. Park_, noticed, xli, 389; xlii, 192.
_Pantoppidan's_ account of the sea serpent, ii, 163.
Paper from the bark of willow, &c., x, 387.
---- from the beach grass, xxxvi, 386.
---- from husks of corn, xxvi, 193.
---- made from marine plants, xv, 169.
----, ivory, iii, 370.
----, lithographic, iii, 370.
----, rice, xxiv, 207.
---- for drawing, a new mode of preparing, xiv, 373.
---- covered with pumice, for removing rust, xv, 169.
---- making, a discovery in, made, x, 193.^f
---- hangings, how protected from injury by dampness of walls, vi, 396.
Papyrus, made from plants, at Syracuse, xxvii, 80.
Paradoxides, _J. Hall_ on, xxxiii, 139.^f
Paragrèles in France, x, 196; xii, 398.
----, efficacy of, xiv, 37.
Parallax of the star 61 Cygni, xxxvi, 200.
Paralysis, cured by lightning, iii, 100.
Paramorphine and Pseudomorphine, xxx, 179.
Parasite tree, _G. W. Long_, xxvi, 106.^f
---- of the honey bee, xxv, 213.
---- of the eggs of the canker worm, xxxviii, 385; xl, 211.
Parasitical plants, xii, 21.
Parhelion, singular, with theory of halos, _E. S. Snell_, xlix, 73.^f
Pargasite, in Massachusetts, x, 11.
----, in New York, xxv, 347.
Parhelia, seen at Otisco, _W. Gaylord_, xxxix, 61.^f
----, seen at Green Bay, _R. E. Clary_, xxviii, 304.^f
Parietin, _R. D. Thomson_, xlix, 195.
_Paris, J. A._, on sandstone, i, 234.
Paris, France, statistics of, iv, 376; ix, 202.
----, suicides in, x, 386.
----, table of punishments in, iv, 386.
----, table of epidemics in, during the past and present centuries,
xxv, 197.
----, disinfection of the dead bodies at the Morgue, xxi, 149.
----, fresh water formations, notice of, vi, 381.
----, Linnæan Society of, v, 382.
----, Tract Society of, v, 383.
----, Conservatory of Arts and Trades, v, 383.
Paris, Maine, minerals of, x, 14; xviii, 293.
_Parker, P._, meteorological observations at Canton, August, 1839,
xxxviii, 301.
----, on volcanic ashes, xl, 198.
_Parker_, on volcano of Hawaii, xl, 117.^f
_Parkes's_ Chemical Catechism, v, 398.
----, Essays, noticed, viii, 190.
_Parkinson_ and _Frodsham_, on the sea and land rates of chronometers,
xxvi, 121.
---- ----, on chronometers, xxix, 297.
_Parnell_, on rare British fishes, xxxv, 310.
_Parnell, E. A._, Elements of Chemical Analysis, xliv, 190.
_Parrot_, on the temperature of the globe, xxvi, 10.
_Parry, Capt. W. E._, observations on the Aurora, notice of, xvi, 148.
Parthian archer, picture of, xlii, 215.
_Partridge, W._, on the manufacture of indigo in the United States,
xviii, 237.
_Pascalis, F._, remarks on hail-rods, x, 196.
----, on the small pox, x, 208.
----, upward forces of fluids, xi, 110, 339.^f
----, on the culture of silk in the United States, xvii, 202;
xviii, 278.
----, obituary of, xxv, 216.
Pasco silver mines, xvii, 43^f; xxiv, 232.
_Pasquier, A. du_, iodine a reagent for hydrosulphuric acid, xl, 123.
Passeres, new species of, xxxi, 192.
Passiflora Warei, v, 297.
Paste, mode of preserving, vii, 379.
Pasteboard roofs, xxiv, 381.
Pastils, use and preparation of alkaline, for calculus, xi, 388.
Pasture, spring, _E. Ives_, iii, 355.
Patagonia fossil bones, _R. Owen_, xxxiii, 208; xxxv, 196.
---- fossil remains, _C. Darwin_, xxxiii, 105.
Patents, number of new, in different countries in 1822, ix, 198.
----, agency for, at Washington, xxxi, 411.
Patent claims in Piedmont and Sardinia, remark on, xvii, 193.
_Patten, J. H._, air pump of, viii, 143.^f
----, ---- ----, gazometer and balance beam of, ix, 92^f, 327.
----, ---- ----, J. F. Dana, remarks on, viii, 275; ix, 327.
_Patterson_, on electricity from steam, xl, 382.
_Pattinson, H._, new mode of extracting silver from lead, xxxv, 299.
_Patton, J. H._, hurricane in India, xxxvi, 71.
_Paulding, N._, on shells, ii, 371.
Pavia, v, 177.
Paving with wood, xxxviii, 136.
_Payen_, means of employing dead animals, xxiv, 326.
----, on the woody tissue of plants, xl, 176.
----, on the bleaching of oils, xlvii, 196.
Peach trees, cause of decay in, xi, 194.
Peaches on an almond tree, ii, 363.
Pearl ashes, method of manufacturing, _G. A. Rogers_, viii, 304.
Pearls and pearl fishery, xxxii, 56, 68.
----, in fluviatile shells, xxv, 257.
_Pearson's_ Domestic Telegraph, iv, 314.^f
Peat, on the use and mode of formation of, _E. North_, xi, 67.
----, on the origin, preparation and uses of, from a memoir by
_Ribaucourt_, xv, 250.
----, gas light from, xxx, 189.
----, instance of bituminization of, in Maine, _C. T. Jackson_,
xxxiv, 73.
----, in Massachusetts, xxii, 38.
----, in New York, i, 139; v, 8; xxxvi, 16.
----, moss, mode of determination of age of, xxix, 349.
Peat-bogs, observations on, _G. H. Adams_, xxxviii, 127.
_Peck, J._, geology of the mining districts in Georgia, western North
Carolina and East Tennessee, with a map, xxiii, 1.
Pecten, uses and economical notice of, xxxii, 248, 219.
Pectic acid, converted to oxalic, xvii, 179.
_Peirce, B._, elements of the third comet of 1845, xlix, 220.
_Peligot, E._, on tea, xlviii, 187.
_Pelletier_, on guaiac resin, xlix, 194.
Peloconite, new mineral species, xxii, 387; xxvi, 386.
Pelopium, new metal, xlviii, 400.
_Pelouze, J._, on tannin, xxviii, 124.
----, on the atomic weights of simple bodies, xlvii, 188.
----, on the solubility of chlorine in water, xlvii, 191.
_Peltier_, on tornadoes, xxxviii, 401.
Pendulum, new compensating, _W. G. Jones_, xxxviii, 274.^f
----, experiments on the vibrations of, with different suspending
springs, _W. J. Frodsham_, xxxvii, 278.
----, _W. J. Frodsham's_ improved compound, xxviii, 107.
----, portable mercurial, _E. J. Dent_, xxxv, 289.
----, vibrations of a mercurial, _G. Baker_, xlviii, 156.
----, barometric compensation of, xlvi, 393.
----, oscillations in the plane of the meridian and at right angles with
the same, different, xxviii, 62.
----, simultaneous motions of the surrounding air and, _S. D. Poisson_,
xxiii, 391.
----, _E. Sabine's_ experiments with, and conclusions, xvii, 364.
----, on the reduction to a vacuum of the vibrations of an invariable,
xvii, 365.
Penetrativeness of fluids, xix, 360.
Penguins, habits of, xlix, 151.
_Pennant, Thos._, life and writings of, xxxvii, 146.
Pennatule flèche, iv, 87.^f
Pennine, form and analysis of, xlvii, 216.
Pennsylvania, coal beds of Wyoming, _Z. Cist_, iv, 1.^f
----, ---- ---- ----, rocks accompanying, vii, 260.
----, ----, remarks on the properties and economical uses of anthracite,
_B. Silliman_, x, 331;
--characters, 332;
experiments on, 333;
uses of, in the arts, 337;
mode of burning, 338, 341;
comparative value of Lehigh and Schuylkill, 339;
price in New York, 340;
general qualities of, 343;
documents relating to the value of, 346.
----, ----, characters of anthracite, _B. Silliman_, xi, 91;
--analysis of the Lehigh by _L. Vanuxem_, 93;
directions as to burning, 94;
remarks on _M. Bull's_ memoir on the healing power of fuels, 98.
----, coal; value, position, extent, &c., of anthracite, _J. Pierce_,
xii, 54.
----, ----, Mauch Chunk, _J. Pierce_, xii, 56;
yield of Mauch Chunk beds in 1825, and statistics relating to, 57;
navigation of the Lehigh, 58;
rations to laborers, 61;
Mount Carbon or Pottsville, 63;
price of coal, 64;
Peter's Mountain, 65;
Wyoming beds, 66;
Lackawanna, 67.
----, ----, on the bituminous, _J. Pierce_, xii, 69;
--use of, in making iron, 73.
----, ---- mines of Belmont on the Lackawanna, _T. Ritter_, xii, 301.
----, ---- on Tioga river, chemical analysis and description of,
_W. Meade_, xiii, 32;
--the two great coal districts of the state, 35.
----, ---- region of the valley of the Lackawanna and Wyoming,
_B. Silliman_, xviii, 308.^f
----, ---- ---- of Mauch Chunk, &c., _B. Silliman_, xix, 1^f, 11;
--mine, 12; new mines, 17; Beaver Meadow mine, 19; xx, 163.
----, ---- region between Cumberland and Pittsburg, _S. W. Pomeroy_,
xxi, 342.
----, ---- vegetable fibres apparent in the anthracite, _B. Silliman_,
xxiv, 173.
----, ---- region of the Monongahela valley, xxix, 60^f, 61, 64.^f
----, ---- ---- of the Conemaugh and Kiskiminitas, xxix, 73, 74.^f
----, ----, remarks on the extent and characters of the bituminous,
_S. P. Hildreth_, xxix, 77.
----, ---- field of Carbon Creek, (Bradford coal field) with analyses,
_W. R. Johnson_, xxxix, 137.
----, ----, southern, _M. C. Lea_, xl, 370;
--various analyses, 373.
----, ----, ----, model of, with notices of geological features, &c.,
_R. C. Taylor_, xli, 80.^f
----, ----, on the general character, limits, and relations of the beds,
_J. Hall_, xlii, 52.
----, ---- formation, _H. D. Rogers_, xli, 177.
----, Beaver Meadow mine, xix, 19.
----, Bethlehem, catalogue of plants near, _J. Wolle_ and
_A. L. Hübener_, xxxvii, 310.
----, Blue ridge gap, xix, 6.
----, Carbon Creek, region, _W. R. Johnson_, xxxix, 137.
----, Chester Co., mineralogy of, _G. W. Carpenter_, xiv, 1.
----, Conemaugh and Kiskiminitas regions, xxix, 71.^f
----, diluvial scratches in, _H. D. Rogers_, xliii, 180.
----, Easton, notice of, _B. Silliman_, xix, 5.
----, ----, rare plants of, _L. de Schweinitz_, viii, 267.
----, ----, geology of the country near, and list of minerals,
_J. Finch_, viii, 236.^f
----, geological survey of, proposed, xii, 173.
----, ---- report of _H. D. Rogers_, noticed, xxxii, 192; xxxiv, 188;
xxxvii, 380; xli, 385.
----, internal improvements in, xxv, 84; xxvi, 108.
----, iron furnace at Mauch Chunk, xii, 61.
----, iron ores of Center and Huntingdon Cos., xii, 73;
--mode of manufacturing, 74.
----, ---- ---- of Belmont coal mines, xii, 302.
----, ---- ----, analysis of, _W. R. Johnson_, xxxviii, 383; xxxix, 142.
----, Lackawanna region and coal, _J. Pierce_, xii, 67.
----, ---- ibid, Belmont, _T. Ritter_, xii, 301.
----, Laurel Mountains, xxi, 346.
----, Lehigh coal and navigation company, xxiv, 173.
----, Lehigh coal, analysis of, xl, 373.
----, Lehigh river, character of, _J. Pierce_, xii, 59.
----, Mauch Chunk and vicinity, xii, 56, 60.
----, ---- ----, _B. Silliman_, xix, 7;--canal, 7, 8; scenery, 8;
railroad, 9, 16; cost of main railway, 11; mines, &c., 11;
public house, 16.
----, mineral resources of, _J. Pierce_, xii, 54.
----, Monongahela valley, rocks and coal, xxix, 58, 60^f, 63.^f
----, Fort Pitt remains, _W. B. Weed_, xxi, 197.
----, Pittsburgh coal strata, xxix, 68.^f
----, ----, amount of coal consumed at, xxix, 79.
----, ----, manufactures of, xxix, 79.
----, Pottsville or Mount Carbon, _J. Pierce_, xii, 63, 65.
----, ----, descent from, to Philadelphia, xii, 64.
----, ----, Carbondale, xviii, 313, 319, 324.
----, salt wells of Conemaugh and Kiskiminitas, xxix, 72, 74.
----, ---- ---- ----, coal consumed in the manufacture, xxix, 79.
----, ---- springs of Conemaugh and Kiskiminitas, and manufacture,
xii, 70.
----, ---- ---- near Pittsburgh, xii, 72.
----, ---- ---- in Mercer Co., xii, 72.
----, scenery from Harrisburg, westward, _W. B. Weed_, xxi, 197.
----, Schuylkill, passage of, and of canal, through the Blue Ridge,
_J. Pierce_, xii, 64; navigation of, 65.
----, soil of the counties near Ohio, xii, 73.
----, trap dikes in, _H. D. Rogers_, xli, 173.
----, Westmoreland Co., footprints in, _A. T. King_, xlviii, 217, 343^f;
xlix, 216.^f
----, Wyoming region and coal beds, iv, 1^f; vii, 260.
----, ---- ---- ----, _J. Pierce_, xii, 66.
----, ---- ---- ----, _B. Silliman_, xviii, 309^f;
--disputed title, 315;
scenery and surface, 316;
people, forts, battle ground, 317.
Pentremites, see ZOOLOGY, _Radiata_.
Pepper, analysis of, iv, 390.
_Pepys, W. H._, electro-magnetic apparatus, vii, 195.
Perca nobilis, dissection of the eye of, xxvii, 216.^f
Perchloric ether, xlii, 63.
_Percival, J. G._, minerals of Berlin, v, 42.^f
----, analysis of _Ad. Brongniart_ on fossil vegetation, vii, 178.
----, on the geology and mineralogy of Sicily, viii, 201.
----, on the zoological characters of formations, viii, 213.
----, curious effect of solar light, xii, 169, 180.
----, Report on the Geology of Connecticut, notice of, xliv, 187.
----, crescent form of dikes first observed by, xlvi, 205.
Percussion powder, xviii, 156.
_Perdicaris, G. A._, on the revival of letters in Greece, xxxvi, 192.
_Perkins, G. R._, interesting properties of numbers, xl, 112.
----, solution of a functional equation, xlii, 69.
----, new method of computing interest, xlvii, 51.
_Perkins, H. C._, notices of fossil bones from Oregon, xlii, 136.^f
_Perkins, J._, compressibility of water, iii, 347.^f
----, engraving on steel, iii, 353.
----, new steam engine, vii, 111.^f
----, mode of applying his method of generating steam to the boilers
of ordinary steam engines, vii, 116, 332.^f
----, on steam engines, xiii, 40.
----, on the cutting of steel by soft iron, vii, 390.
_Perkins, T._, salting of ship timber, ii, 117.
_Perkins's_ Algebra, noticed, xliii, 380.
_Peron_, on the temperature of the ocean, xvii, 295.
_Perrine, H._, on the Agave and other plants used for cordage, xxv, 330.
_Perry, T. H._, magnetic dip in different regions, xlvii, 84.
----, method of adjusting the dipping needle, xxxvii, 277.
----, on some of the probable effects of a resisting medium,
xxxviii, 246.
_Persoon_, obituary notice of, xxxii, 215.
Peru, Andes of, xviii, 182.
----, ----, highest elevations of, xviii, 184.
----, ----, highest habitations of men in, xviii, 183.
----, ----, trachytes of, xviii, 183.
----, ----, the mining regions of, xvii, 43.
----, mines of, xvii, 43^f; xxiv, 232.
----, physical features, xvii, 47.
----, antiquities of, xvii, 116.^f
----, ancient and modern races of, _S. G. Morton_,
xxxviii, 360^f, 365.^f
----, ancient race of men in the Andes, xxix, 358.
----, Atacama, nitrate of soda of, xii, 385.
----, province of Tarapaca, _J. H. Blake_, xxxix, 375; xliv, 1.^f