'28 



I N D E X. 



Electrostatic field round an electric 

 current, on the, 136. 



tubes and insulators, on a new 



reaction between, 133. 



Electrothermal effect in tourmaline, 

 on the, 220. 



Energy, on the conditions necessary 

 for equipartition of, 585. 



Energy flux, on the forms of the 

 lines of, in the neighbourhood 

 of wires leading- electric waves, 

 302. 



Equipartition of energy, on the con- 

 ditions necessary for, 585. 



Ethane and carbon dioxide, on the 

 vapour-pressures of mixtures of, 

 124. 



Everett (Prof. J. D.) on the theory 

 of the resolving power of objectives, 

 160 ; on the comparison of vapour- 

 temperatures at equal pressures, 

 335. 



Ferromagnetic substances, on the 

 magnetostriction of, 45 ; on the 

 change of length of, by magneti- 

 zation, 338 ; on the change of the 

 modulus of elasticity of, by mag- 

 netization, 450 ; on the change of 

 the modulus of rigidity of, by 

 magnetization, 537. 



wires, on the vibration of, in a 



varying magnetizing field, 645. 



Films, on the electrical properties of 

 thin metal, 652. 



Freezing-points, on the theory of, 

 270. 



Gardiner (C. I.) on the fossiliferoua 

 Silurian beds of the Clogher Head 

 district, 416. 



Gaseous spectra, on the presence of 

 dark lines in, 156. 



Gases, on the electrical conductivity 

 produced in, when they pass 

 through water, 352 ; on the dis- 

 charge of electricity through, 

 684. 



Geological Society, proceedings of 

 the, 174, 416, 516. 



Gold, on the Hall effect in, 72. 



Greenly (E.) on the jaspers of S.E. 

 Anglesey, 518. 



Grier (A. G.) on deviable rays of 

 radioactive substances, 315. 



Hall effect in gold, on the, 72. 



Hartley (Dr. W. N.) on the compo- 

 sition of brittle platinum, 84. 



Heat, ou a problem in conduction of, 

 ~\&2 ; on the, evolved or absorbed 

 when a liquid is brought in con- 

 tact with a finely divided solid, 

 240 ; on radiation of, from heated 

 solid bodies, 560. 



Herbert (A. M.) on the effect of the 

 presence of hydrogen on the lines 

 of the carbon spectrum, 202. 



Hill (Rev. E.) on the matrix of 

 the Suffolk chalky boulder-ek»y, 

 418. 



Honda (K.) on the magnetostriction 

 of steel, nickel, cobalt, and nickel- 

 steels, 45 ; on the change of length 

 of ferromagnetic wires by magne- 

 tization, 338; on the change of 

 the modulus of elasticity by mag- 

 netization, 459 : on the change of 

 the modulus of rigidity by magne- 

 tization, 537 ; on the vibration of 

 ferromagnetic wires in a varying 

 magnetizing field, 645. 



Hot bodies, on the emission of nega- 

 tively charged corpuscles by, 253. 



Hydrogen, on the effect of the pre- 

 sence of, on the lines of the carbon 

 spectrum, 202. 



Hyperbolic trigonometrical functions 

 of 0, on a method of mechanically 

 obtaining from the, 238. 



Jce-melting, on the velocity of, 270. 



Insulators, on a new reaction between 

 electrostatic tubes and, 133. 



Ionization of the atmosphere, on 

 excited radioactivity and, 704. 



Iron, on the change of length in, by 

 magnetization, 338 ; on the change 

 of elasticity of, by magnetization, 

 462 ; on the change of rigidity of, 

 by magnetization, 541 ; on the 

 vibration of wires of, in a varying 

 magnetizing field, 650. 



Jacobian of the primary minors of an 

 axisymmetric determinant, on the 

 507. 



Jeans (J. PI.) on the conditions 

 necessary for equipartition of 

 energy, 585. 



Jervis- Smith (F. J.) on a high- 

 pressure spark-gap, 224. 



Jewett (F. 13.) on a method of deter- 

 mining the vapour - density of 

 metallic vapours, 546. 



Jukes-Browne (A. J.) on a deep 

 boring at Lyine Regis, 424. 



