Part 27

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

Peruvian bark, on, _G. W. Carpenter_, ix, 363; xvi, 28. ---- ----, on a new variety of, _G. W. Carpenter_, xx, 52. ---- ----, adulterations in, xix, 81.

_Pestalozzi, H._, death of, xiii, 183.

Pestalozzian system, ix, 163; x, 145.

Pestum, stone of the temples at, xxxvii, 366.

Petalite in Canada, viii, 69.

Petersburg, St., Russia, libraries of, v, 177. ----, Botanic Garden, xx, 175.

Petrified, see _Fossil_.

Petrifying springs in New York, xxxvi, 11.

Petroleum in the salt springs of the Ohio valley, xxiv, 63. ---- in the valley of the little Kenawha, xxix, 86. ---- in the Kenawha valley, xxix, 121. ---- in the valley of the Sandy river, Virginia, xxix, 129. ---- or oil spring of Allegany Co., N. Y., xxiii, 97. ----, well of, near Burksville, Ky., xxxix, 195.

_Pettengill, A._, on floating islands, xii, 122. ----, stellarota of, xvi, 363.

_Pettenkoffer, M._, test for bile, xlix, 206.

Peucedanum ternatum, xxviii, 165.

_Pfaff_, theory of voltaic electricity, xix, 178.

Phacelia, species of, xlv, 171, 172.

Phalæna devastator, i, 154.

Phalangium esculentum, iv, 60.

Pharmaceutical preparations, ii, 373.

Phascolatherium, xxxvii, 230.

Phenacite, xxx, 177. ----, supposed locality at Goshen, Mass., _C. U. Shepard_, xxxiv, 329. ----, not at Goshen, Mass., xliii, 366.

Phi Beta Kappa Society of New York, xxvii, 388.

Philadelphia water works, vi, 375; viii, 193. ----, population of, xxi, 194. ---- College of Pharmacy, Journal of, xxi, 173. ---- Academy of Science, see _Academy_.

_Phillips, J._, on the principles of geology, from the geology of Yorkshire, xxi, 2.

_Phillips, R._, on certain chemical equivalents, xxxvii, 368. ----, on the state of iron in soils, xlix, 394.

_Phillips, W._ and _W. D. Conybeare's_ Outlines of Geology, &c., noticed, vii, 203. ---- ---- Geological arrangement, viii, 261. ----, mineralogical collection of, xvi, 379; xlviii, 219. ----, mineralogy of, _F. Alger's_ edition, noticed, xlvi, 203; xlvii, 333 (reviewed). ----, obituary of, xv, 160.

_Phillips, W._, essay on the Georgia gold mines, xxiv, 1.^f

Philology, origin of the languages of Europe, iv, 379. ----, _F. Adelung's_ conclusion as to the number of languages on the earth, iii, 376; x, 383.

Philosophers, morality of the Greek and Roman, ix, 365.

Philosophical instruments, _Gambey's_, vii, 374. ---- apparatus, xxiv, 175. ---- ----, American, xxvii, 292.

Philosophy of the human voice, _J. Rush_ on, xxv, 425.

Phloridzin, discovery of, announced, xxviii, 383. ----, notice of, xxx, 377.

Phlox, species of, xi, 169, 170; xlv, 177.

Phormium tenax, used for cordage, xxi, 37.

Phosphates of alkalies, action of, on carbonate of lime, &c., _J. L. Smith_, xlviii, 97.

Phosphate of lime in the teeth of infusoria, xxviii, 386. ---- ----, eupyrchroite identical with, xlvi, 32. ---- ----, see _Apatite_. ---- of soda, impurities in, xix, 82.

Phosphorescence of the ocean, v, 133; xvii, 209; xviii, 166, 187. ---- ----, observations on, in the Bonite, xxxvi, 208. ---- ----, _Ehrenberg_, xxxv, 372. ---- of the Gulf of St. Lawrence, xviii, 187. ---- of fluor spar, ii, 142. ---- of several sub-resins, x, 189. ---- communicated by means of electricity, xxi, 378.

Phosphorescent plants, xv, 170.

Phosphori, solar, xvii, 170.

Phosphoric acid in plants, and all vegetable extracts, ii, 358. ---- ----, use of, in jaundice, iv, 162. ---- ----, precipitation of albumen by, xvi, 396. ---- ----, _J. Pelouze_, xxviii, 129.

Phosphorus, fuels connected with the history of, xlix, 197. ----, preparation of, xix, 382. ----, impurities of, xlix, 197. ----, density of vapor of, xxiii, 383; xxxv, 298. ---- in kelp, xiii, 187. ----, combustion of, in nitrous oxide, _R. Hare_, xxxii, 290.^f ----, in vacuo, xviii, 147. ----, inflammation of, in a rarefied medium, xxiv, 390. ----, explosion of, with nitric acid, xvi, 366. ----, mode of powdering, xx, 194. ----, hydrate of, _H. Rose_, xxviii, 140. ----, oxide of, _Berzelius_, xlix, 193. ----, isomeric acids of, xlvi, 64.

Phosphurets, apparatus for deflagrating, in vacuo, xxxix, 366.

Phosphuret of lime, on the preparation of, xvii, 349. ---- ----, xlix, 193. ---- of nitrogen, xxviii, 140.

Phosphuretted hydrogen, on the formation of, _L. C. Beck_, xii, 294. ---- ----, a new, _P. Thenard_, xlviii, 184. ---- ----, effect of, on metallic decompositions, xviii, 403.

Photogenic power of light from burning coke, xxxvii, 368.

Photography, Daguerre's process in, xxxvii, 374; xxxviii, 97. ---- and photogenic drawings, by Daguerre and Talbot, xxxvii, 169. ----, processes in, _A. Fyfe_, xxxvii, 175. ----, perfection of the art of, _J. Robison_, xxxvii, 183. ----, daguerrotype and its applications, _W. H. Goode_, xl, 137. ----, improvement in the daguerrotype process of, _F. A. P. Barnard_, xli, 352. ----, daguerrotype experiment by galvanic light, _B. Silliman, Jr._ and _W. H. Goode_, xliii, 185. ----, daguerrotype pictures, mode of fixing, engraving and painting from, _Berres_, xxxix, 385. ----, copies of engravings by, xlii, 164.