lOND. AND EDIN. PHILOSOPHICAL MAGAZINE, 1832 1838. 45 



Pratt (S.) on the geological character of 

 the coast of Normandy, xi. 210. 



Prawn, on the growth of the, viii. 421. 



Precipitate, white, viii. 498; on the pow- 

 der formed by the action of water on, 

 xi. 428 ; products of the action of al- 

 kalies in excess on, xi. 433. 



Pressure, on the principle of the least, iv. 

 89, 194, 271, 420. 



Prestwich (J.) on the ichthyolites of 

 Gamrie, vii. 325 ; on the geology of 

 Coalbrooke Dale, ix. 382; on some 

 elevations of the coast of Banffshire, 

 xi. 209. 



Prevost (Dr.) on muscular fibre, xii. 293. 



Prideaux (J.) on the meteor seen June 

 29th, 1832, &c. i. 307 ; on voltaic ac- 

 tion, ii. 210, 251; on the theory of 

 thermo-electricity, iii. 205, 262, 398 ; 

 on Mr. Phillips's remarks on chemical 

 symbols, iv. 41, 464 ; on the deduction 

 of the dew-point, xi. 54 ; on the Kauri 

 or Cowdee resin from New Zealand, 

 xu. 249. 



Priestley (Dr.), commemoration of the 

 centenary of the birth-day of, ii. 158, 

 317; report of, ii. 383; Fuseli's por- 

 trait of, ix. 398. 



Prism, on the passage of light through a, 

 ii. 284. 



Pritchard (A.) on test-objects for micro- 

 scopes, ii. 335 : apparatus for illustra- 

 ting the polarization of light, viii. 70. 



Projectile weapon of the native Austra- 

 lians, xii. 329. 



Protochloride of mercury, action of am- 

 monia on the, xi. 504. 



Protoxide of tin, v. 79. 



Prout (Dr.), reply to Dr. W. C. Henry, 

 v. 132. 



Prunus padus, volatile oil of, ix. 155. 



Prussic acid, test for, iv. 151. 



Psen atratum, xii. 17. 



Pseudammonites, fossil genus, ix. 32. 



Psychometer, or measurer of refrigera- 

 tion, viii. 61. 



Pullen's (Prof.) Gresham lectures, xii. 

 454. 



Puma, notes on the, iv. 299. 



Pulo Pinang, on the geology of, i. 224. 



Pulse, on the differential, viii. 63. 



Pyramids of Gizeh, xii. 379. 



Pyrenees, on a freshwater formation in 

 the, iv. 376. 



Pyroacetic spirit, on the compounds de- 

 rived from, xii. 100, 107, 109. 



Pyrogenous acids, iv. 385. 



Pyrometer, on a new register, i. 197, 

 '261. 



Pvromucic acid, manufacture of, vii. 395; 

 "composition of, vii. 429. 



Pyrophori, easy preparation of, x. 319. 



Pyrosmalite, crystalline form of, xi. 261. 



Pyrosoma, some remarks on the, iii. 299. 



Pyrotartaric acid, distillation of, v. 397. 



Pyroxylic spirit, on, ix. 77; x. 45, 116; 

 discovered by Mr. PhiUp Tavlor in 

 1812, vii. 395, 427 ; on a fluid obtain- 

 ed in manufacturing it, vii. 395 ; action 

 of oxacids on, viL 538 ; \'iii. 85. 



QUADRUMANOUS animal, fossil, 

 xii. 34. 

 Quails of India, vii. 229. 

 Quartz, new crystal of, x. 369. 

 Quassia, formation of nitre in extract of, 



xii. 140. 

 Quassin, on, xii. 222 ; preparation of, in 



a pure state, xi. 336. 

 Quekett (E. J.) on the genus Chara of 



Hooker, xii. 97. 

 Quetelet (M.) on shooting stars, xi. 268 ; 



on the height, motion, and nature of 



shooting stars, xi. 270. 

 Quevenne (M.) on polygalic acid, xi. 561 ; 



on modified polygalic acid, xi. 562, 

 Quinia, hydriodate of, xi. 218; iodate of, 



xi. 218 ; elementary composition of, 



xi. 335. 



and iodine, xi. 218. 



Quinine, iodide of, viii. 191. 



RADIATA, fossil, vii. 517. 

 Radiation of heat, on, vii. 296, 

 297. 



Railways, ix. 377, 380; theory of gra- 

 dients in, viii. 51, 97, 243; on vibra- 

 tion of, viii. 70 ; remarks on iron rails, 

 viii. 291, 439; locomotive engines upon, 

 ix. 135. 



Rainbow, explanation of, on the doctrine 

 of interference, viii. 78. 



Rainey (G.) on the feeble attraction of 

 the electro-magnet for small particles 

 of iron, ix. 72, 220 ; reply to Dr. Rit- 

 chie, ix. 469 ; on magnetic reaction, x. 

 193. 



Rain-gauge, self-registering, viii. 69; new, 

 xi. 260, 476. 



Raphides, composition of, xi. 339. 



Rathlin, zoology of, vii. 492. 



Read (S.) on a decimal system of mone- 

 tary calculation, vi. 441. 



Reade (Dr.) on a permanent soap-bubble, 

 xi. 375. 



(Rev. J. B.) on producing achro- 

 matic light in solar and oxy-hydrogen 

 microscopes, x. 185 ; on the solar rays 

 that occasion heat, and on the solar 

 and oxy-hydrogen gas-microscope, x. 

 219; on structure in the ashes of 

 plants, and their analogy to the esse- 



