554 



INDEX. 



Davison (C.) on the animal and semi- 

 annual seismic periods, 310. 



Dewar (Prof. J.) on the electrical 

 resistance of metals and alloys at 

 temperatures approaching the abso- 

 lute zero, 271 ; on the refractive 

 indices of liquid nitrogen and air, 

 328. 



Diamond manufacture, note on, 308. 



Dielectric liquids, on the conducting- 

 power of, 550. 



Dielectrics, experimental investi- 

 gations on, 383. 



Discharges, experiments with high 

 frequency, 300. 



Dunlop (Dr. A.) on raised beaches in 

 Jersey, 230. 



Dykes, on composite, in Arran, 377. 



Dynamics, on the foundations of, 1, 

 233. 



Edgeworth (Prof. F. Y.) on the calcu- 

 lation of errors, 98 ; on the calcu- 

 lation of correlation between 

 organs, 350. 



Elasticity of a crystal according to 

 Boscovich, on the, 414. 



Electric wave-trains, on the passage 

 of, through layers of electrolvte, 

 531. 



Electrical current, on the magnetic 

 field of an, 201. 



resistance of metals and alloys 



at temperatures approaching the 

 absolute zero, on the, 271. 



theory, on a modification of 



Maxwell's, 175. 



waves, on the strength of the, 



when the spark passes in oil, 464. 



Electricity, on the effect of water- 

 vapour on the discharge of, through 

 gases, 313. 



Endothermic reactions effected by 

 mechanical force, on, 351. 



Energy, on the conservation of, 12, 

 249. 



Erdmann (E. O.) on the oxidation of 

 pure aluminium when in contact 

 with mercury, 151. 



Errors, exercises in the calculation of, 

 98. 



Evans (Dr. J. W.) on the geology of 

 Matto Grosso, 549, 



Eelsites and conglomerates between 

 Bethesda and Llanllyfni, on, 148. 



Fleming (Prof. J. A.) on the elec- 

 trical resistance of metals and 

 alloys at temperatures approaching 

 the absolute zero, 271. 



Freezing-point, on the dissociation of 

 compounds in water by the lower- 

 ing of the, 465. 



Galitzine (B.) on the condition of 

 matter near the critical point, 

 552. 



Gases, on brush-discharg-es in, 45 ; 

 on the effect of water - vapour 

 on the discharge of electricity 

 through, 313 ; on the viscosity of, 

 507 ; on the emission of heated, 

 551. 



Geological Societv, proceedings of 

 the, 144, 229, 377, 548. 



Gold, on the electrical resistance of, 

 at temperatures approaching the 

 absolute zero, 284. 



Groom (T.) on the Llandovery and 

 associated rocks of the neighbour- 

 hood of Corwen, 148. 



Hall (T. P.) on new methods of 

 measuring the surface-tension of 

 liquids, 385. 



Harvey (W. II.) on brush-discharges 

 in gases, 45. 



Hering (Prof. E.) on colour-blind- 

 ness, 189. 



Hird (F.) on brush-discharges in 

 gases, 45. 



Hydrogen bromide, on the hydrates 

 of, 111. 



Influence-machines, new, 264, 267. 



Iron, on the electrical resistance of, 

 at temperatures approaching the 

 absolute zero, 289 ; on the elonga- 

 tion produced in soft, by mag- 

 netism, 498. 



Isophotal, on the use of two over- 

 lapping screens as an, 120. 



Jones (Dr. H. C.) on the dissociation 

 of compounds in water by the 

 lowering of the freezing-point, 465. 



Judd (Prof. J. W.) on composite 

 dykes in Arran, 377. 



Jukes-Browne (A. J.) on recent 

 borings through the Lower Creta- 

 ceous strata in E. Lincolnshire, 

 150. 



Kelvin (Lord) on the piezo-electric 

 property of quartz, 331, 384 ; on a 

 piezo-electric pile, 342 ; on the 

 elasticity of a crystal according 

 to Boscovich, 414 ; on the theory 

 of pyro-electricity and piezoelec- 

 tricity of crystals, 453. 



Koch (K. R.) on the conducting- 

 power of dielectric liquids, 550. 



Lake (P.) on the Llandovery and 



