614 



INDEX. 



the skeletons of many ichti^iyosauri, 590; 

 on tlie cranium of an oran outang, 599 ; 

 examination of a foetal kangaroo, 600. 



Owl, short-eared, habits of, 104. 



Oxalo-nitrate of lead, 459. 



Oxide of silver and oxide of lead, definite 



combination of, 217. 

 Oxygenin the atmosphere, on the quantity 

 of, 397. 



Ozocerite, composition of, 389. 



PalsRoniscus Egertonii, 86. 



Parrot, new species of, 215. 



Payen (M.) on a new acetate of lead, 133. 



Pelouze (M.) on the products of the de- 

 composition of cyanogen in water, 339. 



Pemphredon lugubris, P. Morio, and P. 

 unicolor, 17. 



Phaenogaraous plants, on the development 

 of the organization in, 172, 241, 292. 



Phillips (K.), on a new acetate of lead, 

 134; on isomorphism, 407. 



Phosphorescence of the ocean, on the, 211. 



Photometer, on the method of computing 

 the results of experiments with the, 484. 



Physalia pelagica, 528. 



Physiology, vegetable, progress of, 53. 



Planche (M.) on the formation of nitre in 

 extract of quassia, 140. 



Polarization: —cause of elliptical, 10; in 

 the crystalline lens after death, 22; of 

 heat by tourmaline and by refraction, 

 549 ; by reflection, 553. 



Polyhedron, solid, on certain relations in a, 

 323. 



Portlock (Capt.) on the habits of the short- 

 eared owl, 104. 



Potash, bicarbonate of, its preparation, 216; 

 on the equivalent of, 324. 



Potassium, chloride of, detection of salt in, 

 130; ferrocyanide of, its action on sul- 

 phovinates and sulphomethylates, 102. 



Potter (R.), reply to Mr. Wheeler on the 

 method of computing the results of ex- 

 periments with the comparative photo- 

 meter, 484. 



Powell (Prof.) on repulsion by heat, &c. 

 317 ; on Von Wrede's explanation of the 

 absorption of light by the undulatory 

 theory, 114; on the dispersion of light, 

 367. ' 



Pratt (Rev. J. H.) on the equihbrium of 

 fluids, 385. 



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



Prideaux (J.) on the Kauri or Cowdee re- 

 sin from New Zealand, 249. 



Projectile weapon of the native Australians, 

 329. 



Psen atratum, 17. 



Pullen's ( Prof.) Gresham lectures, 454. 



Pyramids of Gizeh, 379. 



Pyroacetic spirit, on the compounds derived 

 from, 100, 107, 109. 



Quadrumanous animal, fossil, 34. 



Quassia, formation of nitre in extract of, 

 140. 



Quassin, on, 222. 



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

 Hooker, 97. 



Reflection, polarization by, 553. 



Refraction, polarization by, 549. 



Refraction, double, on, 47, 145. 



Respiration, on, 300. 



Repulsion by heat, on, 317. 



Resin, Kauri or Cowdee, from New Zea- 

 land, 249 ; its use in the arts, 253. 



Retin Asphalt, composition of, 560. 



Retinic acid, salts of, 562. 



Reviews : — Leithead's Electricity, 127 ; 

 Macfadyen's Flora of Jamaica, 263 ; 

 Hood's Treatise on Warming Buildings, 

 202 ; Curtis's Guide to an Arrangement 

 of British Insects, 202 ; Agnew on the 

 Pyramids of Gizeh, 379; Levy's De- 

 scription of Heuland's Collection of 

 Minerals, 536; Young*s Analytical Geo- 

 metry, 602. 



Rhea Darwinii, 450; Rhea Americana, 

 450. 



Richardson (M.) on the products of the de- 

 composition of cyanogen in water, 339. 



Riddle (Mr.) on the longitude of the Edin- 

 burgh observatory, 525. 



Rigg (R.) on analysing organic com- 

 pounds, 31, 232. 



Ritchie, (Dr.) notice of the late, 275. 



Robinson (Dr.) on the determination of 

 the constant of lunar nutation, 1 1 0. 



Robinson and Russell on the mechanism 

 of waves, 112. 



Rodentia, new, 445. 



Rose (M.) on the detection of metallic 

 chlorides in bromides and iodides, 136; 

 on some new compounds of chlorine, 

 220 ; on chloride of tungsten, 461 ; on 

 the formation of calc spar and arragonite, 

 465. 



Rothman (R. W.) on a very ancient solar 

 eclipse observed in China, 282. 



Royal Astronomical Society, 280, 521. 



Royal Institution, 451, 533. 



Royal Irish Academy, 97, 368. 



Royal Society, 204, 269, 347, 426. 



Sabine (J.), notice of the late, 276. 



Salt, its detection in chloride of potas- 

 sium, 130; process for the purification 

 of, 218. 



Salts, double, of mercury, analysis of, 235 ; 

 efflorescent, absorption of water by, 130 ; 

 on some remarkable, 102; of retinic acid, 

 562. 



Sapyga 4-guttata, ]5. 



Schoenbein (Prof.) on the voltaic relations 

 of certain peroxides, platina, and inactive 

 iron, 225 ; on the current electricity ex- 

 cited by chemical tendencies, 311. 



Schleiden (Dr.) on the development of the 



