522 



INDEX. 



quantities for pyroelectricity, 78; 

 on the cooling of a wire when 

 stretched, 80. 



Dynamo, on the law of the, 1 ; a 

 generator and motor, 20. 



Edgeworth (F. Y.) on the law of 

 error and the elimination of chance, 

 808 ; on the determination of the 

 modulus of errors, 500. 



Edlund (Prof. E.) on the resistance 

 in the voltaic arc, 366. 



Elasticity, on bars and wires of vary- 

 ing, Bl. 



Electric currents, on a new apparatus 

 for measuring, 163. 



Electricity, on applications to, of the 

 reaction upon the driving-point of 

 a system executing forced harmonic 

 oscillations, 369 ; on the discharge 

 of, in an imperfect insulator, 419 ; 

 on an instrument for producing 

 an invariable quantity of, 518 ; 

 on the origin and laws of atmo- 

 spheric, 520. 



Electrodes, on surface-resistance at, 

 to various electrical phenomena, 

 145. 



Electrolytic cells, on transfer-resist- 

 -ance in, 130; on resistance at the 

 surfaces of electrodes in, 249. 



Electromagnet, on the law of the, 1. 



Electromotive force, of certain tin 

 cells, on the, 13; on the seat of 

 the, in voltaic and thermoelectric 

 piles, 51, 263; developed during 

 the combination of zinc and iron 

 in the presence of water, 289 ; of 

 a constant voltaic cell with moving 

 plates, on measurements of the, 

 409. 



Electromotors, observations on, 26. 



Elements, on the numerics of the, 

 151 ; on a new secondary, 164. 



Energy, on the conservation of, in 

 the earth's atmosphere, 453. 



Equations, on the integration of par- 

 tial differential, of the third and 

 higher orders, 63 ; on a machine 

 for solving, 241 ; on a mechanical 

 method of solving quadratic and 

 cubic, 260. 



Error, on the law of, and the elimi- 

 nation of chance, 308. 



Errors, on the determination of the 

 modulus of, 500. 



Exner (Prof.F.) on the origin and the 

 laws of atmospheric electricity, 520. 



Explosions, on the theory of, 165. 



Functions, on the mechanical inte- 

 gration f>f the product of two, 141. 



Gabbros/of Tertiary age, on the, 160. 



Galvanometers, on the calibration of, 

 by a constant current, 29. 



Gases, on the flow of, 185; on the 

 foundations of the kinetic theory 

 of, 343, 481; on the diffusion of, 

 451. 



Geological Society, proceedings of 

 the, 77, 160, 281, 362, 448, 512. 



Gore (Dr. G.) on transfer-resistance 

 in electrolytic cells, 130, 249 ; on 

 surface-resistance at electrodes to 

 various electrical phenomena, 145; 

 on the Peltier-effect at different 

 temperatures, 359. 



Harmonic oscillations of various 

 periods, on the reaction upon the 

 driving-point of a system execu- 

 ting, 369. 



Heat-spectra, on invisible, 394. 



Helmholtz (R. von) on vapour and 

 mist, 451. 



Herroun (E. F.) on the electromo- 

 tive force of certain tin cells, 13. 



Hill (W.) on the beds between the 

 upper and lower chalk of Dover, 

 284. 



Himsted's determination of the ohm, 

 on, 10. 



Holman (Prof. S. W.) on the effect 

 of temperature on the viscosity of 

 air and carbon dioxide, 199. 



Hood (Dr. J. J.) on the theory of 

 fractional precipitation, 119. 



Hudleston (W. H.) on the London 

 Clay at Walton Common, 281. 



Ihinori (T.) on the weight and the 

 cause of the layer of water on glass 

 and other bodies, 452. 



Jannetaz (E.) on some experiments 

 in thermoelectricity, 519. 



Judd (Prof. J. W.) on the gabbros, 

 dolerites, and basalts of Tertiary 

 age, 160. 



Kalischer (M.) on a new secondary 

 element, 164. 



Kendall (P. F ) on the Pliocene beds 

 of St. Erth, 363. 



Lalande (M. de) on a new apparatus 

 for measuring electric currents, 163. 



Lamplugh (G. W.) on glacial shell- 

 beds in British Columbia, 512. 



Langley (Prof. S. P.) on invisible 

 heat-spectra, 394. 



