566 



INDEX. 



theories of oceanic circulation, 242, 

 286, 402, 489. 



Daubree (M.) on contemporary for- 

 mation of iron-pyrites in thermal 

 springs and in sea-water, 562. 



Darwin (G.) on maps^ofthe world,431. 



Debray (H.) on the density of pure 

 platinum and iridium and their 

 alloys, 558. 



Decharme (C.) on sounding flames, 

 496. 



T)e Luynes (V.) on fused boraeic acid 

 and its tempering, 158. 



Deprez (M.) on the velocity of mag- 

 netization and demagnetization of 

 iron, cast iron, and steel, 79. 



Desains (P.) on the cold bands of 

 dark spectra, 331. 



Deville (H. St.-Claire) on the density 

 of pure platinum and iridium, and 

 their alloys, 558. 



Electric conductivity of various forms 

 of carbon, on an experiment for 

 showing, 24. 



force, on the forms of equi po- 

 tential curves and surfaces and lines 

 of, 548. 



Electrical resistance, on the absolute 

 value of the Siemens mercury unit 

 of, 161,404. 



Electricity, on the flow of, in a uni- 

 form plane conducting surface, 475. 



and light, on a new relation 



between, 337, 446. 



Electrized water-surface, on a pro- 

 perty of an, 254. 



Elliptic-function formulae, on some 

 identities derived from, 539. 



Ergal, on the theorem of the mean, 

 and its application to the molecular 

 motions of gases, 26, 101, 191. 



Fisher (Rev. O.) on Mallet's theory 

 of volcanic energy, 302. 



Flames, on sounding, 496. 



Foster (Prof. G. C.) on the flow of 

 electricity in a uniform plane con- 

 ducting surface, 475. 



Gallium, chemical and spectroscopic 

 characters of the new metal, 484. 



Galvanometer, on a new vertical-lan- 

 tern, 434. 



Gases, on the application of the theo- 

 rem of the mean ergal to the mo- 

 lecular motions of, 26, 101, 191; 

 on the action of magnets on rare- 

 fied, 77 ; on friction and heat-con- 



duction in rarefied, 53 ; on thermic 

 equilibrium and heat-conduction in , 

 495. 



Geological Societv, proceedings of 

 the, 152, 325, 409, 556. 



Girders, on the flexure of continuous, 

 179. 



Gladstone (Dr. J. H.) on the augmen- 

 tation of the chemical activity of 

 aluminium, 284 ; on the action of 

 the copper-zinc couple, 285. 



Glaisher (J. W. L.) on some identi- 

 ties derived from elliptic-function 

 formulae, 539. 



Glashan (J. C.) on the motion of a 

 particle from rest towards an at- 

 tracting centre, 20. 



Gooch (F. A.) on two new varieties 

 of vermiculites, 135. 



Guthrie (F.) on stationary liquid 

 waves, 290, 377- 



Heat, on the conduction of, in rarefied 

 gases, 53, 495 ; on the nature and 

 origin of volcanic, 1, 302. 



Ice, experiments on the plasticity of, 

 333. 



Iridium and platinum, on the density 

 of pure, and their alloys, 558. 



Iron, on the velocity of magnetization 

 and demagnetization of, 79 ; on the 

 influence of the texture of, on its 

 magnetism, 255. 



Iron-pyrites, examples of contempo- 

 rary formation of, 562. 



Irradiation, on photographic, 46. 



Isothermal lines of the solar disk, on 

 a method of obtaining thermographs 

 of the, 159. 



Jamin (J.) on magnets formed from 

 compressed powders, 255. 



Kerr (Dr. J.) on a new relation between 

 electricity and light, 337, 446. 



Kundt (A.) on friction and heat-con- 

 duction in rarefied gases, 53. 



Laplace's theory of the tides, on, 227, 

 277, 279, 388, 544. 



Light, on the cosmical activity of, 

 250, 446; on the influence of, 

 upon the conductivity of crystal- 

 line selenium, 416 ; of the sky, on 

 the polarization of the, 497. 



and electricity, on a new rela- 

 tion between, 337. 



Lipmann (G.) on a property of an 

 electrized water-surface, 254. 



Liquids, on some phenomena con- 



