1142 



Index. 



Oscillation-hysteresis, on, in triode 

 generators, 177, 700. 



Owen (L.) on the phosphate deposits 

 of Ocean Island, 1186. 



Parallels, on the theory of, 401. 



Partington (Prof. J. R.) on the 

 specific heats of ammonia, sulphur 

 dioxide, and carbon dioxide, 369; 

 on latent heats of fusion of benzo- 

 phenone, phenol, and sulphur, 436. 



Pendulum, on coupled vibrations by 

 means of a double, 567. 



Percival (A. S.) on a method of 

 tracing; caustic curves, 258. 



Phase difference from metallic re- 

 flexion, on the, 471. 



Phenol, on the latent heat of fusion 

 of, 436. 



Phosphorus vapour, on the disap- 

 pearance of gas in the electric dis- 

 charge in the presence of, 914. 



Photo-chemistry, on fluorescence 

 and, 757. 



Photo-electric effect of the radiation 

 from boron and carbon, on the, 145. 



Plates, on the equations of equi- 

 librium of elastic, under normal 

 pressure, 97 ; on circular, of 

 variable thickness, 953. 



Platinum, on the effect of gases on 

 the contact difference of potential 

 of, 162. 



resistance thermometers, on the 



insulation of wires in, 95. 



Poisson's ratio for spruce, on, 871. 



Pol (Dr. B. van der, jr.) on oscillation 

 hysteresis in triode generators, 

 177, 700. 



Polarization phenomena in X-ray 

 bulbs, on, 193. 



Ponder (A. O.) on an attempt to 

 separate the isotopes of chlorine, 

 430. 



Poole (Dr. J. H. J.) on the minimum 

 time necessary to excite the human 

 retina, 345. 



Positive ions, on mechanical dis- 

 integration caused by, 226. 



Potential difference, on contact, and 

 thermionic emission, 162, 557. 



Potentials, on scalar and vector, due 

 to moving electric charges, 131; 

 on retarded, and Iluyghens's 

 principle, 1014. 



Prescott (Dr. J.) on the equations of 

 equilibrium of an elastic plate, 

 79. 



Preston (Miss K.M.) on the resistance 

 of electrolytes at high frequencies, 

 537. 



Priestley (Prof. H. J.) on the Einstein 

 spectral shift, 396. 



Probabilities, on the application of, 

 to the movement of gas-molecules, 

 241. 



Projective and metrical scales, on the 

 relation between the, 420. 



Quantum theory, on the selection 

 principle of the, 1112. 



Radiant spectrum, on Brewster's, 357. 



Radiation, on the theory of, 641, 698 ; 

 on the interaction between, and 

 electrons, 1064. 



Radioactivity, on induced, from 

 alpha-ray bombardment, 938. 



Raman (Prof. 0. V.) on the pheno- 

 menon of the radiant spectrum, 357; 

 on the convection of light in 

 moving gases, 447 ; on a new 

 optical property of biaxial crystals, 

 510. 



Ratner (S.) on polarization phe- 

 nomena in X-ray bulbs, 193. 



Rawlins (F. I. G.) on a relationship 

 between the focal length of objec- 

 tives and the number of rings seen 

 in convergent polarized light, 766. 



Ray (S.) on the viscosity of air in a 

 transverse electric field, 1129. 



Reflexion, on an interferometer 

 method of measuring the phase 

 difference from, 471 ; on the, of 

 X-rays from imperfect crystals, 800. 



Relativity, on the identical relations 

 in the theory of, 600. 



Resistance of electrolytes at high 

 frequencies, on the, 537. 



Retarded potentials and Huyghens's 

 principle, on, 1014. 



Retina, on the minimum time neces- 

 sary to excite the human, 345. 



Richardson (Prof. O. W.) on gravi- 

 tation, 138 ; on the effect of gases 

 on contact difference of potential, 

 162 ; on contact difference of 

 potential and thermionic emission, 

 557. 



Rings and brushes observed in a 

 spath hemitrope, on the, 560. 



Roaf (H. E.) on the analysis of sound 

 waves by the cochlea, 349. 



Robb (Dr. A. A.) on a graphical 

 solution of some differential equa- 

 tions, 206. 



