INDEX. 



615 



d'Orbigny's view of the white clialk of 

 the, 456 ; on the foraminifers of the 

 white chalk of the, ib. ; list of forami- 

 nifers found in the, 461. 



Peltier (M.) on the phsenomena of the 

 electricity of steam, 100. 



Pendulums, invariable, experiments made 

 with, 602. 



Peneroplis planatui, 444. 



Pennine, analysis of, 121. 



Phonetics, facts and observations relating 

 to the science of, 124, 363. 



Phosphoric acid, anhydrous, action of, on 

 camphoric acid, 238. 



Pikrophylle, analysis of, 122. 



Plana (M.), award of the astronomical 

 medal to, 153. 



Platinum, on Magnus and Gros's salts of, 

 284, 293 ; manufacture of, 442. 



Playfair (L.) on a new fat acid from the 

 butter of nutmegs, 102. 



Plesiosaurus, 552. 



Poggendorff (Prof.) on the surprising in- 

 tensity of currents of the zinc iron cir- 

 cuit, 42. 



Poisson (D.), notice of the late, 74. 



Polythalamia, living, geological distribu- 

 tion of, on the African and Asiatic coasts 

 of the Mediterranean, 443 ; remarks on, 

 444 ; calcareous-shelled, 453. 



Potash, oenanthylate of, 421 ; preparation 

 and formation of yellow prussiate of, 

 515; preparation of chlorate of, 518; 

 sensibility of a reagent for, 606. 



Potatoe spirit, oil of, 439. 



Potter (R.) on the application of Huy- 

 ghens's principle in physical optics, 1 1 ; 

 on conical refraction in biaxal crystals, 

 343. 



Powell (Rev. B.) on certain points in the 

 theory of undulations, 161, 270. 



Prideaux (J.) on an undescribed subsuU 

 phate of iron, 397. 



Prinsep (J.), notice of the late, 64. 



Protochloride of cacodyl, 436. 



Provostaye (M. de la) on the isomorphism 

 of oxamethane and chloroxamethane, 

 372. 



Pterodactylus, 552. 



Rainbows, supernumerary, 520. 



RedfieUi (W. C.) on the direction of the 

 wind as observed in the storm of Dec. 

 15, 1839, 17; on the tornado which 

 visited New Brunswick, June 19, 1835, 

 20. 



Rees (G. O.) on chyle and lymph, 156. 



Refraction, conical, in biaxal crystals, 313. 



Resins from the milk of the cow-tree, 291. 



Riddle (K.), on the longitude of Madras, 

 computed from moon-ciilminating ob- 

 acrvalions, 596. 



lligaud (Prof.), notice of the late, 144. 



Roberts (M. J.) on the cause of the pro- 

 duction of daguerreotype figures, 301. 



Roemer (M.) on the chalk and the sub- 

 jacent formations to the Purbeck stone 

 inclusive in the north of Germany, 566. 



Rose (A.) on the combination of sulphuric 

 acid with nitric oxide, 81. 



Rose (H.), analysis of chlorospinelle, 122. 



Rotalia Beccarii, 444. 



Rothman (R. W.) on an Arabic globe be- 

 longing to the Astronomical Society, 593. 



Royal Society, proceedings of the, 57, 139, 

 307, 547. 



Rumker (Mr.) ephemeris and elements 

 of the third comet discovered by Galle, 

 597. 



Rata graveolens, oil obtained from, 207. 



Rutherford (W.) on a new and simple se- 

 ries, by which the ratio of the diameter 

 of a circle to its circumference may 

 easily be computed to any required 

 degree of accuracy, 561. 



Sabine, oil of, 438. 



Sabine (Major Edward) on terrestrial 

 magnetism. No. 2., 549. 



Salts, haloid, on the state in which they 

 are dissolved by water and alcohol, 

 357 ; bleaching salts, 422. 



Schafhaeutl (Dr.C.) on the circumstances 

 under which steam developes positive 

 electricity, 95 ; on stcain considered as 

 a conductor of electricity, 14, 265. 



Schweizer (.M.), analysis of antigorite and 

 Pennine, 120. 



Science, letters on the progress of, in En- 

 gland, reviewed, 412. 



Sea, on the mean level of the, 183. 



Sedgwick (Prof.) on the classification and 

 distribution of the older rocks of north 

 Germany, 398. 



Sierra Almagrera, mineral veins of the, 

 561. 



Sierra de Gador, and its lead mines, 563. 



Siliceous-shelled infusoria, list of, 453. 



Silver, oenanthylate of, 419; sensibility 

 of a reagent for, 607. 



Simms's (Mr.) comparison of the Neapo- 

 litan standard yard with that of the 

 Astronomical Society, 603. 



Smith (A.) on Irish tin ore, 134. 



Snails, oc(5\irrence of uric acid in, 210. 



Soda, hyposulphite of, mode of preparing 

 the, 211. 



Sorites Orhicultis, 444. 



Soubeiran (M.) on the oil of bergamot, 

 383. 



Sounds, on the natural arrangement of 

 consonantal, 363. 



Starch, sensibility of, as a. reagent for io- 

 dine, 604. 



