INDEX. 



649 



in August 1871 , in H.M.S. ' Shearwater/ 

 97. 



Nitrogen, on the spectrum of, 484. 



Obituary notices of Fellows deceased : — 

 James Yates, i. 

 George Grote, iii. 

 Dr. Augustus Waller, xi. 

 The Rev. William Yenables Vernon 



Hareourt, xiii. 

 Sir John Frederick William Herschel, 



Bart., xvii. 

 William Baird, xxiii. 

 Wilhelm Karl Bitter v. Haidinger, xxv. 

 Heiurich Gustav Magnus, xxvii. 

 Sir Roderick Iinpey Murchison, Bart., 



XXX. 



Colonel William Henry Sykes, xxxiii. 



Opium alkaloids, contributions to the 

 history of: Part III. Action of hydi'iodic 

 acid on codeia, 8 ; Part IV. Action of 

 hydriodic acid on morphia in presence 

 of phosphorus, 203 ; physiological action 

 of derivatives of, 210 ; Part V. On the 

 polymerides of codeia, 278. 



Orcin, contributions to the history of: 

 No. II., 72. 



Orcins, chlorine- and bromine-substitution 

 compounds of the, 72. 



Orion, on the spectrum of the great 

 nebula in, 379. 



Ormerod (E. L.), admitted, 379. 



O^en (R.) on the fossil mammals of 

 Australia: Part VI. Genus Phascolomys, 

 GeoTr., 66 ; Part VII. Genus Phasco- 

 lomt/s, species exceeding the existing 

 ones in size, 303. 



Oxides of nitrogen, spectrum of, 487. 



Oxygen, action of, on copper nitrate in a 

 state of tension, 290. 



Paraffins, on the combined action of heat 



and pressure on the, 488. 



, on the normal, 137. 



Parker (W. K.), Bakerian Lecture, on 



th3 structure and development of the 



skull of the salmon (Salmo salar, L.), 



360. 



Parkes (E. A.), further experiments on 

 the effect of alcohol and exercise on the 

 elimination of nitrogen and on the 

 pulse and temperature of the body, 

 402. 



Pendulum experiments in India, 52. 

 Pengelly (W.), report on the exploration 



of Bi'ixham Cave, 514. 

 Perry (Rev. S. J.) and Sidgreave3 (Rev. W.), 



magnetic survey of the east of France 



in 1869, 39. 

 Prestwich (J.), report on the exploration 



of Brixham Cave, conducted by a 



committee of tho Geological Society, 



and under the immediate superinten- 

 dence and record of Wm. Pengelly, 

 F.R.S., aided by a local committee; 

 ■with descriptions of the organic re- 

 mains by G. Busk, F.R.S., and of the 

 flint implements by John Evans, F.R.S., 

 514. 



Phascolomys, VI., 66 ; VII., 306. 

 Phosphorus bases, new researches on, 

 221. 



Plants, fossil, of the coal-measures (Part 

 III.), on the organization of, 199. 



' Porcupine ' deep-sea dredging-expedi- 

 tions, on the Echinidea of the, 491. 



Presents, list of, 61, 112, 192, 264, 313, 

 375, 527. 



Pressure, action of, on the paraffins, 488. 



Pritchard (U.) on the structure and 

 function of the rods of the cochlea in 

 man and other mammals, 370. 



Protoplasmic and fungus-life, on the de- 

 velopment of, 187, 191. 



Putrefaction, on, 185 ; on the relative 

 power of various substances in pre- 

 venting or arresting, 187, 191. 



Pyrocones, 449. 



Pyrology, or fire analysis, 449. 



Quadrature of the circle, approximate geo- 

 metrical solutions of the problems of 

 the, 525. 



Rapaees, description of the eye, and parti- 

 cularly of the ciliary muscle, in three 

 species of the order, 351 ; supplement, 

 358. 



Raynaud (Jules) on a mode of measuring 

 the internal resistance of a multiple 

 battery by adjusting the galvanometer 

 to zero, 159. 



Reciprocal surfaces, corrections and addi- 

 tions to the memoir on the theory of, 22. 



Refraction, on the law of extraordinary, 

 in Iceland spar, 443. 



Respiration, some remarks on the me- 

 chanism of, 122. 



Rings, on the. produced by crystals when 

 submitted to circularly polarized light, 

 333. 



Ross (Capt. W. A.), pyrology, or fire 



analysis, 449. 

 Routh (E. J.), admitted, 379. 

 Royal Medal awarded to J. Stenhouse and 



G. Busk, 56. 

 Russell (W. J.), admitted, 379. 



Sabine (Sir E.), contributions to terrestrial 

 magnetism : No. XIII., 443. 



, his anniversary address, 49. 



Saline solutions, on a relation be ween the 

 surface-tension of liquids and the super- 

 saturation of, 342. 



