INDEX. 



559 



relations of the distances between 

 the, 462. 



Plateau (F.) on a particular case of the 

 formation of soap-bubbles, 407. 



Potter (Prof.) on the laws of the ex- 

 pansion of the transparent liquids 

 by increase of temperature, 347. 



Pratt (Archdeacon) on the stability of 

 arches, 262 ; on the nearly spherical 

 arrangement of the mass of the 

 earth, 342. 



Prestwich (J.) on the flint implements 

 found at Moulin-Quignon, 322. 



Proctor (B. S.) on the focal adjust- 

 ment of the eye, 295. 



Pyramid, on the centre of gravity of 

 a truncated triangular, 167. 



Quincke (Dr. G.) on the position of 

 the oscillations of the aether-par- 

 ticles in a rectilinearly polarized 

 ray of light, 190. 



Quintics, on, 223, 294. 



Radiation, on the effects of nocturnal, 

 within the tropics, 1 40. 



Rankine (W. J. M.) on plane water- 

 lines, 303 ; on the application of 

 barycentric perspective, 387 ; on 

 the expansive energy of heated 

 water, 388, 436. 



Raoult (M.) on chemical heat and 

 voltaic heat, 522. 



Refraction, on the theory of double, 

 466. 



Reich (F.) on the new metal indium, 

 488. 



Richter (Th.) on the new metal in- 

 dium, 488. 



Rieth (M.) on the decomposition of 

 the aldehydes and acetates by zinc- 

 ethyle, 541. 



Robinson (J.) on the diffusion of 

 vapours, 545. 



Roscoe (H. E.), photochemical re- 

 searches, 151. 



Rose (Prof. H.) on a new series of 

 metallic oxides, 363. 



Roux (M.) on the composition of the 

 water of the Dead Sea, 553. 



Royal Society, proceedings of the, 

 67, 147, 225, 311, 391, 484, 542. 



Rutile, on the artificial preparation 

 of, 537. 



Sagenite, on the artificial preparation 

 of, 538. 



Sanna-Solaro (P. J. M.) on the artifi- 

 cial production of hail, 184. 



Smith (Dr. R. A.) on the absorption 

 of gases by charcoal, 311. 



Soap-bubbles, on a particular case of 

 the formation of, 407. 



Sorby (H. C.) on the original nature 

 and subsequent alteration of mica- 

 schist, 157. 



Soret (T. L.) on the volumetric rela- 

 tions of ozone, 554. 



Sound, on Laplace's correction for the 

 velocity of, 384. 



Spectrum, on the length of the waves 

 of certain bright lines in the, 259. 



Star chromatoscope, description of 

 the, 327. 



Stars, on the lines in the spectra of 

 some of the fixed, 319. 



Steam-boilers, on the numerical ex- 

 pression of the destructive energy 

 in the explosion of, 329. 



Stewart (B.) on the radiation and ab- 

 sorption of gases, 219. 



Storm-glass, experimental examina- 

 tion of the, 93. 



Sulphuric acid, on the elasticity of 

 the vapour of, 502. 



Sun and planets, on the numerical 

 relations of the distances between 

 the, 462 ; on the distance of the, 

 from the earth, 524. 



Sunlight, on the measurement of the 

 chemical action of direct and dif- 

 fuse, 151. 



Sutcliffe (T.) on some remarkable 

 hailstones, 67. 



Sylvester (Prof. J. J.) on the centre 

 of gravity of a truncated triangular 

 pyramid, and on the principles of 

 barycentric perspective, 167 ; on a 

 theorem of the integral calculus, 

 293. 



Tait (Prof. P. G.) on the conservation 

 of energy, 144. 



Tate (T.) on the elasticity of the va- 

 pour of sulphuric acid, 502. 



Taylor (John), biographical notice of 

 the late, 73. 



Temperatures, on the measurement 

 of high, 336. 



Thallium, on the discovery of the 

 metal, 55 ; on the spectrum of, 

 228 ; on the electrical conductivity 

 of, 236; researches on, 317; on 

 the distribution of, 536 ; on the in- 

 fluence of temperature on the elec- 

 tric conducting-power of, 542. 



