542 



INDEX. 



Duhem (P.) on the application of 

 thermodynamics to capillary phe- 

 nomena, 230. 



Durham (J.) on the volcanic rocks 

 of North-eastern Fife, 77. 



Dynamo, on the equations of the, 

 288. 



Earth, on the constitution of the 

 crust of the, 1 ; on the physical 

 structure of the, 233, 331 ; on the 

 annual precession calculated on 

 the hypothesis of the solidity of 

 the, 328. 



Edgeworth (F. Y.) on some problems 

 in probabilities, 371. 



Elasticity, on bars and wires of vary- 

 ing, 259. 



Electric current- and potential-me- 

 ters, on the application of electro- 

 lysis to the standardizing of, 389. 



currents, on a new instru- 

 ment for recording the strength 

 and direction of varying, 96 ; on 

 the induction of, in an infinite 

 plane current sheet rotating in a 

 field of magnetic force, 140. 



Electric-light fire-damp indicator, on 



an, 145. 

 Electrical conductivity of gases and 



vapours, on the, 387. 

 experiment, on an, 388. 



residue, simple demonstration 



of the, 80. 



resistance of carbon, under pres- 

 sure, 358, 442. 



Electricity, on a mode of maintaining 

 tuning-forks by, 216. 



and magnetism, notes on, 175, 



469. 



Electro-chemical researches, 104. 



Electromagnet, on the formulas of 

 the, 288. 



Electromagnets, 535. 



■ , on the law of similar, 298. 



Electrometer, on an absolute spheri- 

 cal, 79. 



Electromotive forces, on the seat of 

 the, in the voltaic cell, 70. 



Electroscope, on the gold-leaf, 228. 



Emmott (W.) on an electric-light 

 fire-damp indicator, 145. 



Fire-damp indicator, on a, 145. 



Fisher (Rev. O.) on the variations of 

 gravity at certain stations of the 

 Indian arc of meridian, and on the 

 constitution of the Earth's crust, 1. 



Force, on the tension of lines of, 535. 



Frolich (Dr.) on the theory of the 

 dynamo, 290. 



Galvanometer, on the " ghost " in 

 the, 540. 



Gas, on the law of attraction amongst 

 the molecules of a, 81. 



Gases, on the electrical conductivity 

 of, 387. 



Geological Society, proceedings of 

 the, 72, 220. 



Glass, on the decomposition of, by 

 carbon dioxide, 530. 



Gravity, on the variations of, at cer- 

 tain stations of the [ndian arc of 

 meridian, 1. 



Gray (T.) on a new standard sine- 

 galvanometer, 368 ; on the electro- 

 lysis of silver and copper, and the 

 application of electrolysis to the 

 standardizing of electric current- 

 and potential-meters, 389. 



Hall's phenomenon, on some experi- 

 ments relating to, 226. 



Heaviside (O.) on the self-induction 

 of wires, 118, 273, 332. 



Hennessy (Prof. H.) on the physical 

 structure of the Earth, 233 ; on the 

 annual precession calculated on 

 the hypothesis of the Earth's solid- 

 ity, 328. 



Hemes (R. S.) on the Bagshot beds 

 of the London basin, 78. 



Hicks (Dr.) on the Pre-Cambrian age 

 of certain rocks in Pembrokeshire, 

 73. 



Hughes (Prof.) on some perched 

 blocks, 220. 



Hyperbolagraph, on a new, 138. 



Integrator, on a form of spherical, 

 147. 



Iron, on the energy of magnetized, 

 175 ; on the magnetic torsion of 

 wires of, 251 ; on the change in 

 magnetic moment of, upon torsion, 

 50. 



Keller (M.) on the increase of tem- 

 perature produced by a waterfall, 

 312. 



Kolacek (F.) on the gold-leaf electro- 

 scope, 228. 



Kriiger (R.) on a new method for 

 determining the vertical intensity 

 of a magnetic field, 311. 



Langley (Prof. S. P.) on hitherto un- 

 recognized wave-lengths, 149. 



Laurie (A. P.) on the electromotive 

 force of voltaic cells having an 



