526 



INDEX. 



Green's theory of double refraction, 



on, 116. 

 Griinwald (Dr. A.) on the mathe- 

 matical spectral analysis of mag- 

 nesium and carbon, 843. 

 Harker (A.) on eruptive rocks in 



S.W. Caernarvonshire, 520. 

 Heat, on the insulating action of 

 various substances in respect of 

 radiant, 523. 



Heaviside (O.) on electromagnetic 

 waves, and the forced vibrations of 

 electromagnetic systems, 130, 202, 

 379. 



Hehnholtz's definition of valency, on, 

 21. 



Henrichsen (S.) on the magnetism of 

 organic bodies, 522. 



Heyes (J. F.) on the tetravalency of 

 oxygen, and on the varying valency 

 of the elements, 221 ; on valency, 

 validity, and residual affinity, 29?. 



Hicks (Dr. H.) on the Cae-Gwyn 

 cave, 446. 



Hill (W.) on the lower beds of the 

 Upper Cretaceous series in Lin- 

 colnshire and Yorkshire, 445. 



Holden (H.) on the change of den- 

 sity of the electrolyte at the elec- 

 trodes, 276. 



Hughes (Prof. T. M'K.) on the po- 

 sition of the Oberrnittweida con- 

 glomerate, 71. 



Hunt (Dr. T. S.) on the integral 

 weight of water, 269. 



Hutchins (Prof. C. C.) on a new 

 instrument for the measurement of 

 radiation, 76. 



Hygrometer, new, 78. 



Images, on the general laws of bright- 

 ness of, 216. 



Induction, on the variation of the 

 coefficients of, 453. 



Influence-machine, on a modified 

 water-dropping, 233. 



Iron, on the effect of temperature on 

 the thermoelectrical properties of, 

 45 ; on the recalcscence of, 103. 



Irving (Rev. A.) on the Bagshot 

 beds of the London basin, 241 ; 

 on the Red- Rock series of the 

 Devon coast section, 241. 



Keeping (H.) on the Barton and 

 Upper Bagshot formations, 444. 



Kohlrausch (F.) on the thermal con- 

 ductivity of hard and soft steel, 448. 



Lamb (Prof. H.) on electric endos- 



mose, and on the existence of n 

 slidiug coefficient for a fluid in 

 contact with a solid, 52. 



Lamps, on the efficiency of incan- 

 descent, with direct and alterna- 

 ting currents, 476. 



Lecher (Dr. E.) on the convection of 

 electricity by evaporation, 241. 



LeConte (Prof. J.) on mountain for- 

 mation, 450; on glacial motion, 452. 



Light, on the influence of, upon the 

 electric discharge, 162 ; on the 

 emission of, by ignited bodies, 242 ; 

 on the absolute wave-length of, 

 245, 343 ; on the influence of, on 

 the thermal conductivity of crys- 

 tallized selenium, 324; on the 

 action of, on the electrical conduc- 

 tivity of the haloid salts of silver, 

 457. 



Lightning-rods, on the price of the 

 factor of safety in the materials for, 

 170. 



Liquid ellipsoid, on the, motion of a, 

 under its own .attraction, 40. 



Liquids, on electrical transportation 

 in, 78. 



Love (A. E. H.) on the motion of a 

 liquid ellipsoid under its own 

 attraction, 40. 



Love (E. E. J.) on discriminating 

 real from accidental coincidences 

 between the lines of different 

 spectra, 1. 



Lusana (E.) on the influence of light 

 on the thermal conductivity of 

 crystallized selenium, 324. 



Magnesium, mathematical spectral 

 analysis of, 343. 



Magnetic circuit, on the, of dynamo 

 machines, 496. 



fields, on the production of in- 

 tense, 322. 



Magnetism, on the influence of, on 

 the electrical resistance of bismuth 

 and its alloys with lead and tin, 

 191 ; on the, of organic bodies, 522. 



Magnetization, on the effect of, on 

 the thermoelectrial properties of 

 bismuth, 285. 



Man- (J. E.) on the Stockdale shales, 

 519. 



Maxwell's law of the distribution of 

 velocities, on the proof of, 89. 



Michelson (W.) on the distribution 

 of energy in the spectra of solids, 

 425. 



