Price of labor and subsistence in some parts of Europe, xxxvi, 176. _Priestley, J._ philosophical character of, _W. Henry_, xxiv, 28. ----, discoveries by, xxiv, 30. Primula farinosa, iv, 59. _Prince, James_, on the sea-serpent, ii, 154. _Prince, John_, memoir of, xxxi, 201.^f _Prince, W._, a fruit, between the Spanish chesnut and the Maryland chinquapin, iii, 77. Prince Regent's Inlet, geology of, xvii, 10. Princeton, battle of, painted by J. Trumbull, xxxix, 231. Principia of Newton, new edition of, vi, 379. ---- ----, review of, xi, 238; xii, 28, 330; xiii, 311. Prinos coriaceus, v, 293. Printing on zinc, x, 388. ----, a mode of stereotyping by Senefelder, xi, 386. ----, invention of stereotyping, xvii, 161. ----, stereotype, original papers by _C. Colden_ and _B. Franklin_ on, xxiv, 319. ---- designs, new mode of, vii, 191. ----, anastatic, xlix, 401. ---- press, improvements in, by J. I. Wells, iii, 311.^f ---- ----, inking machine, Wood's, xxiii, 103.^f ---- ---- for the blind, v, 385. Prisons, Society for the Amelioration of, iii, 374. Prizes offered by the Royal Society of London, xxv, 412. Prize given by the Royal Society to _J. F. W. Herschel_, for a paper on double stars, xxv, 412. ---- respecting the ammoniacal azoturet of potassium, offered by the St. Petersburg Academy, xxv, 205. ----, the Montyon, presented, xxv, 189. ----, the De Lalande, given to E. Sabine, xii, 194. ----, ----, xxv, 190. ---- of the Academy of Sciences, xiv, 380, 389; xxii, 194. Problems, diophantine, xxxi, 156. ----, dynamical, new solutions of, xxxviii, 106. Producta, see ZOOLOGY, _Mollusca_. Profile mountain, New Hampshire, _M. Field_, xiv, 64^f; xxxiv, 122. Pronouns, nature of, explained, xxxiv, 337. Proportions, definite, in Chemistry, _D. Olmsted_, xii, 1. Prospect Hill, East Haven, Ct., scenery of, vii, 3. Proteus of the North American Lakes, _S. L. Mitchill_, iv, 181; vii, 68.^f ----, _D. H. Barnes_, xi, 285. Protococcus kermesinus, analogous to red particles in blood, xxxvi, 206. _Prout, W._, analysis of starch sugar, xxxv, 299. Providence Franklin Society, xviii, 195. ---- tornado, _R. Hare_, xliii, 137. ---- ----, _W. C. Redfield_, xliii, 263.^f Prunnerite, new mineral species, xx, 197. Prussia, population of, ix, 184. ----, universities of, xx, 388. Prussian travellers, vii, 195. Prussiate of potash, red, deoxidation of, _C. F. Schönbein_, xlix, 203. ---- ----, manufacture of, at Glasgow, _T. Thomson_, xli, 49. Prussian blue, new mode of preparing, viii, 380. ---- ----, researches into the manufacture of, xv, 178. ---- ----, formation and nature of, xviii, 332. ---- ----, manufacture of, at Glasgow, xli, 50.