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. Photographic delineation of nebulæ; at Rome, _P. F. de Vico_, xliv, 375. ---- impression of the solar spectrum, _J. W. Draper_, xliv, 204. ---- impressions obtained on silver, &c., without previous preparation, xliv, 159. ---- preparation made with ferro-cyanate of potash, _R. Hunt_, xlii, 317. ---- paper, mode of preparing, xxxvii, 171, 175, 361. ---- ----, action of the different rays of the spectrum on, producing colors, _J. F. W. Herschel_, xxxviii, 111. ---- ----, intensity of light in diffuse daylight measured by, _A. Ure_, xxxviii, 107. ---- process, observations on, _W. F. Channing_, xliii, 73. ---- ---- called Chromatype, _R. Hunt_, xlvi, 396. ---- ----, by which dormant pictures are made, which the breath or moisture will develop, xlvi, 393. Photometer, _X. de Maistre_, xxiv, 378.^f ----, new, _C. Daubeny_, xxxviii, 96. Phrenology, notice of _Gall's_ and _Spurzheim's_ views, xxiii, 357. ----, _G. Combe's_ lectures on, in New Haven, xxxviii, 391. ----, remarks on, xxxix, 65. Phthisis in Paris in 1828, xix, 193. Phyllites, fossil plants, generic characters of, vii, 182. Phyllite in Massachusetts, xvi, 207. Physa, see ZOOLOGY, _Mollusca_. Physalis pubescens, xi, 170. _Physick, P. S._, notice of, xxxviii, 155. Physics, _N. Arnott's_ Elements of, noticed, xx, 155.