INDEX. 



567 



McMahon (Major-General C. A.) on 

 the crystalline rocks of the Lizard 

 district, 136. 

 Magnetism, on the theory of, 192, 

 253, 318 ; on some of the effects 

 of, on rods of iron, nickel, and 

 other metals, 383. 

 Magneto-optic phenomenon, on 



Kerr's, 320. 

 Marr (J. E.) on the Cross Fell 



inlier, 135. 

 Melaphyres of Oaradoc, on the, 229. 

 Mercury, on a method of determining 



the surface-tension of, 564. 

 Moelwyns, on the geology of the, 



133. 

 Motion of a finite conservative 



system, on periodic, 375, 555. 

 Nichols (E. L.) on the influence of 

 temperature on the colour of pig- 

 ments, 401. 

 Nicholson (Prof. H. A.) on the 



Cross Fell inlier, 135. 

 Nickel, on some of the effects of 



magnetism on rods of, 383. 



Obach (Dr. E.) on a relationship 



between specific inductive capacity 



and latent heat of vaporization, 113. 



Obsidian, on a spherulitic and per- 



litic, 137. 

 Ostwald (Prof. W.) on chemical 



action at a distance, 145. 

 Parker (J.) on the theory of mag- 

 netism and the absurdity of dia- 

 magnetic polarity, 192, 253. 

 Periodic motion of a finite conserva- 

 tive system, on, 375, 555. 

 Perry (Prof. J.) on a steam-engine 

 indicator for high speeds, 63 ; on 

 the study of transformers, 168 ; 

 on Mr. Blakesley's method of mea- 

 suring power in transformers, 185 ; 

 on a table of zonal spherical har- 

 monics, 512. 

 Pfaundler (Prof.) on a method of 

 determining specific heat by means 

 of the electrical current, 232. 

 Phosphorus, on a new modification 



of, 365. 

 Pickering (S. U.) on the theory of 

 dissociation into ions, 20 ; on Mr. 

 Lupton's method of reducing the 

 results of experiments, 90 ; on che- 

 mical action at a distance, 478. 

 Pigments, on the influence of tem- 

 perature on the colour of, 401. 



Platinum thermometers, on the con- 

 struction of, 104. 

 Post-Tertiary marine deposits on the 



South Coast, on some, 140. 

 Power, on alternate current and po- 

 tential difference analogies in the 

 methods of measuring, 204. 

 Preston (S. T.) on an acoustic ther- 

 mometer, 58. 

 Rayleigh (Lord) on dynamical prob- 

 lems in illustration of the theory 

 of gases, 424. 

 Resistance standards, on the value of 



some mercury, 70. 

 Retinal oscillations, on, 397. 

 Richardson (Dr. A.) on the expan- 

 sion of chlorine by light as applied 

 to the measurement of the inten- 

 sity of rays of high refrangibility, 

 277. 

 Riecke (E.) on the molecular theory 



of diffusion and electrolysis, 562. 

 Roberts-Austen (W. C.) on the 



specific heat of basalt, 353, 

 Rocks, on the igneous, of the south 

 of the Isle of Man, 135; on the 

 crystalline, of the Lizard district, 

 136. 

 Riicker (Prof. A. W.) on the relation 

 between the density and compo- 

 sition of dilute sulphuric acid, 304 ; 

 on the specific heat of basalt, 353. 

 Rutley (F.) on a spherulitic and per- 

 litic obsidian, 137; on the mela- 

 phyres of Caradoc, 229. 

 Salts, on the mutual solubility of, in 



water, 75. 

 Schuster (A.), electrical notes by, 9. 

 Sentis (H.) on a method of determi- 

 ning the surface-tension of mer- 

 cury, 564. 

 Silver, on allotropic, 337, 564. 

 Sissingh (R.) on Kerr's magneto-optic 



phenomenon, 320. 

 Skinner (S.) on an apparatus for 

 measuring the compressibility of 

 liquids, 79. 

 Sky, on the analysis of the light 



diffused by the, 141. 

 Smith (F. J.) on an instrument for 

 measuring chronograph traces, 126; 

 on some of the effects of magnetism 

 on rods of iron, nickel, and other 

 metals which have received a per- 

 manent torsional set ; and a new 

 form of chronograph stylus, 383. 



