INDEX. 



559 



Minerals, descriptions of new Cornish, 

 473. 



Monro (C. J.) on a case of stereo- 

 scopic illusion, 15. 



Moou, on the radiant heat of the, 

 162. 



Moore (J. C.) on lake-basins, 526. 



Naphthylmercaptan, researches on, 

 530. 



Nebulas, on the spectra of, some, 

 151. 



Nitric acid, on the estimation of, in 

 waters, 378. 



Odling, (Prof. W.) on aluminium 

 ethide and methide, 316. 



Oefele (M. von) on a nerc class of 

 sulphur-compounds, 529. 



Oppenheim (M.)-on the action of bro- 

 mine and iodine on allylene. 306. 



Optic image, on a simple mode of 

 determining the position of an, 327- 



Orion, on the spectrum of, 319. 



Phillips (Prof. J.) on the planet Mars, 

 322. 



Phosphorite from Spain, analysis of, 

 340. 



Photo-chemical researches, 233. 



Pisaui (M.) on the chemical compo- 

 sition of meteorites of Orgueil, 

 552. 



Plane, on a theorem relating to five 

 points in a, 460. 



Popp (M.) on yttria, 374 ; on cerium, 

 376. 



Potter (Prof.) on the applicability of 

 Alexander's formula for the elastic 

 force of steam to the elastic force 

 of the vapours of liquids, 98. 



Prisms, new method of establishing 

 the equations which regulate the 

 torsion of elastic, 61. 



Quartic surface, note on a, 19. 



curves, on, 105. 



Radiation, researches on thermal, 

 58 ; from a revolving disk, note on, 

 476. 



Ramsay (Prof. A. C.) on the glacial 

 theory of lake-basins, 285. 



Rankine (W. J. M.) on the graphic 

 measurement of elliptic and tro- 

 choidal arcs, 22; on stream-lines, 

 25 ; on the elasticity of vapours, 

 283 ; on rational approximations to 

 the circle, 421. 



Rays, on combustion by invisible, 

 241. 



Redtenbacher (Prof.) on caesium and 

 rubidium, 375. 



Richer (M.) on an electrical machine 

 constructed of sulphur, 551. 



Roscoe (Prof. H. E.) on a method of 

 meteorological registration of the 

 chemical action of total daylight, 

 233. 



Roval Institution, proceedings of the, 

 241, 316. 



Royal Societv, proceedings of the, 

 65, 151, 233, 319, 390, 473, 541. 



Rubidium, on the separation of, 376. 



Saint- Venant (M. de) on the work or 

 potential of torsion, 61. 



Schoyen (M.) on the synthesis of 

 butyric acid, 308. 



Schroder van der Kolk (Dr. H. W.) 

 on the mechanical energy of che- 

 mical actions, 269. 



Screw, on the application of the prin- 

 ciple of the, to the floats of pad- 

 dle-wheels, 249, 351. 



Semenoff (M.) on the preparation of 

 ethylene gas, 306. 



Siemens (Dr. W.) on the heating of 

 the glass plate of the Leyden jar 

 by the discharge, 244. 



Silico-tungstates, on the, 377. 



Solar radiation, on the relative heat- 

 ing of the soil and of the air by, 10. 



spots, on the nature of, 237, 390. 



system, on a new method of 



determining the translatory motion 

 of the, 489. 



Solids, on the condition of the mole- 

 cules of, 108. 



Spectra, on the reversal of the, of 

 metallic vapours, 338. 



Steam, on the elastic force of, 98, 

 169. 



Stereoscopic illusion, on a case of, 15. 



Stewart (B.) on the nature of solar 

 spots, 237, 390 ; on the radiation 

 from a revolving disk, 476. 



Stone (E. J.) on change of climate 

 due to excentricity of the earth's 

 orbit, 538. 



Stream-lines, observations on, 25. 



Sulphur-compounds, on a new class 

 of, 529. 



Tait (Prof. P. G.) on the history of 

 energy, 55 ; on the radiation from 

 a revolving disk, 476. 



Temperature, on lunar influence over, 

 247. 



