524 



INDEX. 



total solar eclipse of August 18, 1868, 

 125. 



Perry (Key. S. J.), magnetic surrey of 

 the west of France, 486. 



Phenyl-mercaptan, 62. 



Phenyl-mercaptide of lead, decomposi- 

 tion of, 64. 



Phenylene sulphide, 65. 



-, sulphobromide of, 65. 



Phenyl-hyposulphurous acid, 66. 



Photometer, description, 367, 369. 



Photosphere and subjacent parts, on the, 

 34. 



Physical constitution of the sun and 

 stars, 1. 



Plants, on a certain excretion of carbonic 



acid by living, 408. 

 Pliicker (J.), obituary notice of, lxxxi. 

 Polar clock, notice of, 145. 

 Propane, on the derivatives of, 372. 

 Pseudoscope, notice of, 145. 



Radcliffe (C. P.), researches in animal 



electricity, 377. 

 Reciprocal surfaces, memoir on the theory 



of, 220. 



Rennoldson (Capt. D.), observations of the 

 total solar eclipse of Aug. 18, 1868, 125. 



Researches conducted for the medical de- 

 partment of the Privy Council at the 

 Pathological Laboratory of St.Thomas's 

 Hospital, 253. 



Retina, a fourth contribution to the ana- 

 tomy of the, 357. 



Reynolds (J. R.) admitted, 453. 



Ringer (S.) and Stuart (A. P.) on the 

 temperature of the human body in 

 health, 287. 



Robinson (Sir S.) admitted, 471. 



Robinson (T. R.), appendix to the de- 

 scription of the great Melbourne tele- 

 scope, 315. 



Rokeby (Lieut.), results of magnetical 

 observations made at Ascension Island, 

 latitude 7° 55' 20" south, longitude 

 14° 25' 30" west, from July 1863 to 

 March 1866, 397. 



Rosse (Earl of) on the radiation of heat 

 from the moon, 436. 



Royal medal awarded to Rev. Gr. Salmon, 

 147 ; to Mr. A. R. Wallace, 148. 



Rubies, on the structure of, 291. 



Rumford medal awarded to Dr. B. Stew- 

 art, 149. 



Salisbury (Marquis of) elected, 252 ; ad- 

 mitted, 291. 



Salmon (Rev. Gr.), Royal medal awarded 

 to, 147. 



Sapphires, on the structure of, 291. 

 Saturn, on the corrections of Pouvard's 



elements of, 345. 

 Savory (W. S.) on the structure of the 



red blood-corpuscle of oviparous verte- 



brata, 346. 

 Schorlemmer (C.) on the derivatives of 



propane (hydride of propyl), 372. 

 Ship, loss of a, through compass errors, 



415. 



Sidgreaves (Rev. W.) and Stewart (B.), 

 results of a prehminary comparison of 

 certain curves of the Kew and Stony- 

 hurst declination magnetographs, 236. 



Sifted air, behaviour of, in a vacuum, 

 229. 



Skull of the common fowl, on the struc- 

 ture and development of the, 277. 



Sky, on the blue colour of the, 223. 



Skylight, on the polarization of, 223. 



Smith (A.) on the causes of the loss of the 

 iron-built sailing-ship ' Grlenorchy,' 

 408. 



Sodium, on a new class of organo-metallic 



bodies containing, 286. 

 Solar prominences, observations of the 



spectrum of, 91 ; supplementary note 



on, 128. 



, cyclonic action in, 417. 



, on a method of viewing the, 



without an eclipse, 302. 



protuberances, on the, 276. 



radiation, 515. 



Solids, on the fracture of brittle and vis- 

 cous, by shearing, 312. 



Solitary stars, of, 47. 



Solly (E.) readmitted, 252. 



Sorby (H. C.) on jargonium, a new ele- 

 mentally siibstance associated with zir- 

 conium, 511. 



and Butler (P. J.) on the structure 



of rubies, sapphires, diamonds, and 

 some other minerals, 291. 



Soundings, deep-sea, 179. 



South polar regions, completion of reduc- 

 tion of magnetic survey of, 143. 



Southern nebula?, additional observations 

 of, 303. 



Specific heat of aqueous mixtures and so- 

 lutions, 333. 



Spectra of yellow organic substances con- 

 tained in animals and plants, results of 

 researches on, 253. 



, gaseous, preliminary note of re- 

 searches on, in relation to the physical 

 constitution of the sun, 288. 



, , researches on, in relation to 



the physical constitution of the sun, 

 stars, and nebulae. 



Spectroscopic observations of the sun: No. 

 II., 128, 131; No. III., 350; No. IY., 

 415, 506. 



Spectroscopic observations of eclipse of the 

 sun, 74. 



Spectrum, lightning, on the, 61. 

 of a solar prominence, 91 ; supple- 

 mentary note on, 128. 



