INDEX. 



471 



Molecules, active, Mr. Brown on the 

 existence of, in organic and inorganic 

 bodies, 161. 



Morgan ( W.) letter to, on the experience 

 of the Equitable Society, 339. 



Mummy, Egyptian, examination of 

 some of the substances connected 

 with, 291. 



Natural history, the advantages attend- 

 ing the use of the English language 

 in, 454 ; of Jamaica, plan for investi- 

 gating the natural productions of, 

 460. 



Nickel, sulphates of, Mr. R. Phillips 

 on, 287. 



Nixon (J.) on Kater's horizontal float- 

 ing collimator, 218; notice of a me- 

 teor, 316. 



Novaculite, 387. 



Nummulites in the green-sand for- 

 mation, 235. 



Obituary : — Mr. J. Atkinson, 395. 



Obsidian, chrysolite in the cavities of, 

 66. 



Occultations of stars by the moon, Prof. 

 Encke on, 409. 



Ochsenheimer's genera of the Lepi- 

 doptera of Europe, Mr. Children's 

 abstract of, 278, 34S, 444. 



Oltmann's tables for calculating heights 

 by the barometer, 1 94. 



Opaque objects, microscopical exami- 

 nation of, 429. 



Ores, silver, on the amalgamation of, 

 234. 



Otley (J.) on an easily-constructed ba- 

 rometer for measuring altitudes, 234. 



Oxide, caseic, 71. 



Oxide, red, of manganese, on, 31 ; of 

 manganese, 22, 96 ; brown, of chro- 

 mium, 307. 



Palladium, action of acids on, 230. 



Patents, list of, 76, 157, 237, 316, 465. 



Pear-encrinite, Mr. Gray on a new, 219. 



Pearson's (Rev. Dr.) Appendix to his 

 Introduction to Practical Astronomy, 

 134. 



Pendulums, invariable, 137. 



■, simple, expression for the 

 vibration of, 338. 



Pentland's (J. B.) observations on the 

 Peruvian Andes, 115. 



Peroxide of manganese, 35. 

 Peruvian Andes, Mr. Pentland's ob- 

 servations on, 115. 



Phillips (John) on the geology of the 

 neighbourhood of Ferrybridge, 401. 



(Richard) on the sulphates of 



nickel, 287 ; on pyrophorus, 231 ; 

 on chloride in black oxide of man- 

 ganese, 306. 

 Phosphuret of aluminum, 150. 



Plastic clay of Auteuil, Websterite 

 found in, 81. 



Platina, native, masses of, 308 ; Russian 

 coinage of, 458. 



Pollen of plants, microscopical obser- 

 vations on, 161. 



Potash, prussiate of, combination of 

 chlorine with, 385. 



Protoxide of manganese, on, 27. 



Prout (Dr.), Tiedemann and Gmelin's 

 reply to, on the presence of free acids 

 in the stomach, 3; remarks on, 120. 



Prussiate of potash, combination of 

 chlorine with, 385. 



Psilomelane, analysis of, 102. 



Pyrolusite, analysis of, 100. 



Pyrophorus, on, 231. 



Quadratic equations, adfected, method 

 of solving, 125. 



Quina and cinchonia, gallates of, 147. 



Ray (John), notice of the commemo- 

 ration of the second centenary of the 

 birth -day of, 379. 



Reptiles, fossil, 236, 312. 



Reviews of Books; — Martin's Geolo- 

 gical Memoir on a part of Western 

 Sussex, 38 ; Dr. Fyfe's Elements of 

 Chemistry, 50; Rev. Dr. Pearson's 

 Appendix to an Introduction to Prac- 

 tical Astronomy, 134; Dr. Harwood 

 on the Curative Influence of the 

 Southern Coast of England, 134 ; 

 Watkins's Popular Sketch of Electro- 

 Magnetism, or Electro- Dyuamics, 

 220; Wallace's Elements of Al- 

 gebra, 370. 



Russian coinage of platina, 458. 



Saline solutions, on the influence of the 

 air in the crystallization of, 215. 



Salts, cupreous, effect of ebullition on, 

 232. 



Saturn and its ring, inequality of the 

 dark space between, 73. 



Sea, on the pressure of, 36, 119. 



Seers's (J.) method of solving adfected 



quadratic equations, 125. 

 Seleniuret of aluminum, 150. 



Sharpe (S.) on the figure of the cells 

 of the honeycomb, 19; on the vitri- 

 fied fort of Dunnochgoil, 123; on 

 the figure of the earth, 443. 



Shepard, (C. U.) on native iron? 



slightly arseniuretted, 73. 

 Silver-ores, on the amalgamation of, 



234 ; chloride of silver, 384. 

 Societies, learned : Royal Society, 55 ; 

 Linnaean Society, 6 1,454; Geological 

 Society, 222,294; Astronomical So- 

 ciety, 62, 136, 298; Royal Geolo- 

 gical Society of Cornwall, 374 ; 

 Royal Academy of Sciences of Pa- 

 ris, 139, 301, 377, 455; Royal Insti- 



