656 



INDEX. 



Pettigrew (J.) on the arrangement of 

 the muscular fibres of the ventricu- 

 lar portion of the heart of the mam- 

 mal, 433. 



Phenylamine, new derivatives of, 104. 



Phospharsonium compounds, 608. 



Phosphate of lime, occurrence of, in a 

 crystalline form in human urine, 281. 



Phosphorus bases, researches on : No. 

 VI., 100 ; No. VII., 189 ; No. VIII., 

 603; No. IX., 608; No. X., 610; 

 No. XI., 613 ; No. XII., relations be- 

 tween the monoatomic and the poly- 

 atomic bases, 619, 645. 



, contributions to the history of, 



Parts I., II., III., 568. 



Photochemical researches, Part IV., 39. 



Plagiostomes, on the structure of the 

 chorda dorsalis of, and on the rela- 

 tion of its proper sheath to the de- 

 velopment of the vertebrae, 214. 



Pliicker (J.), abstract of a series of 

 papers and notes concerning the elec- 

 tric discharge through rarefied gases 

 and vapours, 256. 



Polariscope, observations made with, 

 during the ' Fox ' Arctic Expedition, 

 558. 



Pollock (SirF.) on Format's theorems of 

 the polygonal numbers (first com- 

 munication), 571. 



Poly-ammonias, notes of researches on : 

 No. VI., 104 ; No. VII., 224 ; No. 

 VIII., 495 ; No. IX., 596 ; No. X., 598. 



Polygonal numbers, on Fermat's theo- 

 rems of (first communication), 571. 



Powell (B.) comparison of some recently 

 determined refractive indices with 

 theory, 199. 



Pratt (J. H.) on the curvature of the 

 Indian arc, 197, 648. 



Prestwich (J.) on the occurrence of flint- 

 implements, associated with the re- 

 mains of extinct mammalia, hi un- 

 disturbed beds of a late geological 

 period, 50. 



Purple of the ancients, natural history 

 of, 579. 



Quaternary cubics, on, 513. 



Radcliffe ( C. B .), an inquiry into the mus- 

 cular movements resulting from the 

 action of a galvanic current upon 

 nerve, 347. 



Radiant heat, transmission of, through 

 gaseous bodies, 37. 



Rankine (W. J. M.), supplement to a 

 paper read January 27, 1859, on the 

 thermodynamic theory of steam-en- 



gines with dry saturated steam, and its 



application to practice, 183. 

 Refractive indices, comparison of with 



theory, 199. 



Regelation, note on, 440. 

 , on the apparent universality of a 



principle analogous to, 450. 

 Ringer (S.) on the alteration in the pitch 



of sound by conduction through dif- 

 ferent media, 276. 

 Ritter (K.), obituary notice of, xlii. 

 Roscoe(H.E.) , photochemical researches, 



Part IV., 39. 

 Royal Medal awarded to A. Cayley, 



173 ; to Gr. Bentham, 176. 

 Ryan (Sir Edward), election of, 289. 



Sabine (E.) on the solar-diurnal varia- 

 tion of the magnetic declination at 

 Pekin, 360. 



on the laws of the phenomena of 



the larger disturbances of the magnetic 

 declination in the Kew Observatory, 

 with notices of the progress of our 

 knowledge regarding the magnetic 

 storms, 624. 



Salmon (Rev. Gr.) on quaternary cubics, 

 513. 



Sensibility, experimental researches on, 

 510. 



Sheffield (Earl of), election of, 510. 



Sight, analysis of, 381. 



Simpson (M.) on the action of acids on 

 glycol (second notice), 114. 



on cyanide of ethylene and succinic 



acid (preliminary notice), 574, 644. 



Smith (Lieut.-Col. 0. H), obituary no- 

 tice of, xxiv. 



Spectrum, relations of the colours of, 

 404, 484. 



Spottiswoode (W.) on an extended form 

 of the index symbol in the calculus of 

 operations, 207. 



Solar spectrum, on the lines of, 339. 



Sound, alteration of pitch of, by con- 

 duction through different media, 276. 



Stanley (Lord Edward), election of, 

 192. 



Staunton (Sir Gr. T.), obituary notice of, 

 xxvi. 



Steam, density of, at all temperatures, 

 469. 



Steam-engines with dry saturated steam, 

 application of thermodynamic theory 

 of, to practice, 183. 



Stephenson (R.), obituary notice of, xxix. 



Stewart (B.), description of an instru- 

 ment combining in one a maximum 

 and minimum mercurial thermometer 

 invented by Mr. James Hicks, 312. 



