INDEX. 



527 



Mountain formation, on, 450, 521. 

 Newall (H. F.) on the recalescence 



of steel, 510. 

 Nicholson (Prof. H. A.) on the Stock- 

 dale shales, 519. 

 Nickel, on the temperature at -which, 

 begins to lose its magnetic pro- 

 perties, 372. 

 Obermayer (A. V.), experiments on- 



St. Elmo's fire, 323. 

 Oldham (R. D.) on the law governing 

 the action of flowing streams, 240. 

 Organic bodies, on the magnetism of, 



522. 

 Oxygen, on the tetravalency of, 221. 

 Parker (J.) on the thermodynamics 

 of cryohydrates, 406 ; on an exten- 

 sion of Carnot's theorem, 512. 

 Perry (Prof. J.) on the efficiency of 

 incandescent lamps with direct and 

 alternating currents, 476; on the 

 magnetic circuit of dynamo ma- 

 chines, 496. 

 Polarization of platinum plates, on 



the, 487. 

 Post-glacial time, an estimate of, 



319. 

 Power, on the conditions of maximum 

 efficiency in the transmission of, by 

 alternating electric currents, 30. 

 Prestwich (Prof. J.) on the correla- 

 tion of some of the Eocene strata 

 in the Tertiary basins of England, 

 Belgium, and the North of France, 

 238. 

 Puluj (J.) on an apparatus for illus- 

 trating the fall of bodies in a va- 

 cuum, 77. 

 Pumps, on the application of hy- 

 draulic power to mercurial, 313. 

 Quantities, on a ne-w method of re- 

 ducing observations relating to 

 several, 184. 

 Radiation, on a new instrument for 

 the measurement of, 76 ; on some 

 electrical phenomena provoked by, 

 314. 

 Reade (T. M.) on the consequences 

 of a level-of -no-strain in a cooling 

 globe, 210 ; on an estimate of post- 

 glacial time, 319 ; on tidal action 

 as an agent of geological change, 

 338 ; on mountain formation, 521. 

 Recalescence, experiments on, 110 ; 



of steel, 510. 

 Refraction, on Fresnel's kinematics 

 of double, 116 ; on the numerical 



relation between the index of, and 

 the wave-length within a refrac- 

 tive medium, and on the limit of, 

 326. 

 " Resistance," on the use of the term, 



419. 

 Righi (Prof. A.) on some electrical 

 phenomena provoked by radiation, 

 314. 



Riniington (E. C.) on the measure- 

 ment of the power supplied to the 

 primary coil of a transformer, 482. 



Rocks, on stratified Palaeozoic, near 

 Morlaix, Brittany, 71 ; on the ho- 

 rizontal movements of, 517 ; on 

 eruptive, in S.W. Caernarvon- 

 shire, 520. 



St. Elmo's fire, experiments on, 323. 



Schidlowsky (F.), application of the 

 diffusion of gases and vapours 

 through porous bodies to deter- 

 mine the amount of moisture and 

 carbonic acid in the surrounding 

 air, 77. 



Selenium, on the influence of light 

 on the thermal conductivity of 

 crystallized, 324. 



Silver, on the action of light on the 

 electrical conductivity of the haloid 

 salts of, 451. 



Sliding coefficient, on the existence 

 of a, for a fluid in contact with a 

 solid, 52. 



Smith (F. J.) on the application of 

 hydraulic power to mercurial 

 pumps, 313. 



Soap-bubbles, experiments with, 409. 



Spectra, on discriminating real from 

 accidental coincidences between 

 the fines of different, 1 ; on the 

 distribution of energy in the, of 

 solids, 425. 



Spectral analysis, mathematical, of 

 magnesium and carbon, 343. 



Steel, on the thermal conductivity of 

 hard and soft, 448 ; on the reca- 

 lescence of, 510. 



Stefan (Prof.) on the production of 

 intense magnetic fields, 322. 



Stratigraphieal table for Western 

 Europe, on a, 274. 



Streams, on the law governing the 

 action of flowing, 240. 



Sumpner (W. E.) on the variation 

 of the coefficients of induction, 453. 



Surface-elevations, on the mean 

 height of, 7. 



