INDEX. 



543 



Hopkinson (Dr. J.) on the refractive 

 index and specific inductive capa- 

 city of transparent insulating 

 media, 242. 



Hunt (B.) on mechanical equiva- 

 lence, 177. 



Hydrogen, on the function of per- 

 oxide during combustion, 222. 



Images, on an application of acci- 

 dental, 149. 



Induction, experimental comparison 

 of coefficients of, 95. 



Inductive capacity, on the specific, of 

 transparent insulating media, 242. 



Integrating-machines, on some, 77. 



Interference phenomena in a new 

 form of refractometer, on, 236. 



Jamin (M.) on the effects produced 

 in a vacuum by the current of the 

 Gramme machines, 536. 



Kendall (J. D.) on the glacial depo- 

 sits of West Cumberland, 71. 



Kerr (Dr. J.) on electro-optic expe- 

 riments on various liquids, 153, 

 243. 



Lacoine (E.) on the variations of the 

 . resistance of electrical machines 

 with their velocity, 76. 



Lagarde (M.) on the illuminating- 

 power of the simple radiations, 

 72. 



Larmor (Prof. J.) on the electrostatic 

 dimensions of a magnetic pole, 

 429. 



Lead, on the fluid density of, 362. 



Le Conte (J.) on sound-shadows in 

 water, 98. 



Lettsom (W. G.) on rhabdophane, a 

 new mineral, 527; on the dichroism 

 of two European andalusites, 529. 



Liquids, electro-optic experiments on 

 various, 153, 248. 



Magnetic pole, on the dimensions of 

 a, in the electrostatic system of 

 units, 376, 381, 427, 429, 431, 530. 



Maneuvrier (G.) on the effects pro- 

 duced in a vacuum by the current 

 of the Gramme machines, 536. 



Manganese, on the separation of, 

 from nickel, 170. 



Mechanical forces, on integrating- 

 apparatus for the measurement of, 

 77. 



Metals, on the fluid density of cer- 

 tain, 360. 



Michelson (A. A.) on interference 

 phenomena in a new refractometer, 

 236. 



Mills (Dr. E. J.) on chemical equi- 

 valence, 169, 177. 



Milne (J.) on the elasticity- and 

 strength-constants of Japanese 

 rocks, 70. 



Minerals, new, 527. 



Molecular action, on the conserva- 

 tion of, 491. 



velocities, on the distribution 



of, in gases, 47. 



Nichols (E. L.) on the electrical re- 

 sistance and coefficient of expan- 

 sion of incandescent platinum, 38. 



Nickel, separation of, from manga- 

 nese, on the, 170. 



Ordinals, new transformations of, 44. 



Organ-pipes, on the pitch of, 340. 



Oxygen, on the compressibility and 

 critical point of, 308 ; on the con- 

 stitution of the lines forming the 

 low-temperature spectrum of, 330. 



Ozone, on the liquefaction of, 467. 



Perspective, on physiological, 309. 



Phosphorescence, on the violet, in 

 calcium sulphide, 212. 



Photodynamic paraboloid, on the, 

 74. 



Physiological perspective, on, 309. 



Plateau (J.) on an application of 

 accidental images, 149 ; on a little 

 illusion, 379. 



Platinum, on the electrical resist- 

 ance and the coefficient of expan- 

 sion of incandescent, 38 ; on the 

 luminous intensities of the radia- 

 tions emitted by incandescent, 

 147. 



Pseudo-carbons, on, 325. 



Radiation, on the heat of, 225. 



Radiations, on the illuminating- 

 power of the simple, 72. 



Rayleigh (Lord), acoustical observa- 

 tions by, 340. 



Refractive index of transparent insu- 

 lating media, on the, 242. 



Refractometer, on interference phe- 

 nomena in a new form of, 236. 



Rhabdophane, description and analy- 

 sis of the new mineral, 527. 



Roberts (W. O.) on the fluid den- 

 sity of certain metals, 360. 



Rocks, on the elasticity- and strength- 

 constants of Japanese, 70. 



Rosenstiehl (A.) on the employment 

 of rotating disks for the study of 

 coloured sensations, 538. 



Rowland (Prof. H. A.) on the results 

 accomplished in the manufacture 



