

101-1 



INDEX. 



Molecular and electronic potential 

 energy, on, 249 ; attraction, on, 

 629, 901. 



Molecule, on the shape of the, -1 15 ; 

 on tlir attraction constant of a, of 

 a substance, 905. 



Musical arc oscillations in coupled 

 circuits, on, 660. 



Nicholson (Dr. J. W.) on the bend- 

 ing of electric waves round a large 

 sphere, L67; on the accelerated 

 motion of an electrified sphere, 

 l')10 ; on the accelerated motion of 

 a dielectric sphere, 828; on the 

 approximate calculation of Bessel 

 functions of imaginary argument, 

 938. 



Nichrome, on the specific charge of 

 the ions emitted by hot, 557. 



Nickel, on the specific charge of the 

 ion- emitted by hot. 548. 



Non-Newtonian mechanical systems 

 and Planck's theory of radiation, 

 943. 



Optical determination of stress, on 

 the, 740 : properties of metals, on 

 the electron theory of the, 885. 



o.-cillation detectors, actuated by 

 resistance-temperature variations. 

 on, 128 : on the energy relations 

 of certain, used in wireless tele- 

 graphy, 533. 



Oscillations in coupled circuits, on 

 musical are. 660. 



( temium, on the specific charge of 

 the ions emitted by hot, 549. 



Palladium, on the specific charge of 

 the ions emitted by hot, 548. 



Pendulum motion and spherical tri- 

 gonometry, on, 728. 



Phaseograph, on the study of vari- 

 able currents by means of the, 969. 



Phillips (W. C. S.) on a galvano- 

 meter for alternate current circuits, 

 309. 



Photoelectric effect, on a difference 

 in the, caused by incident and 

 emergent light, 331. 



fatigue of metals, on the, 564. 



Physical properties of liquids at the 

 boiling-point, on relations between 

 the, 522. 



Pianoforte sounding-board, on the, 

 052. 



Pipes, on the lagging of, oil. 



Pirret (Miss R.) on the ratio between 

 uranium and radium in minerals, 

 345. 



Planck's theory of radiation, on non- 

 Newtonian mechanical systems 

 and, 943. 



Platinum, on the heat developed 

 during the absorption of electrons 

 by, 173; on the specific charge of 

 the ions emitted by hot, 546. 



Point discharging in air, on the 

 forces at the surface of a, 266 ; on 

 the ionizing processes at a, 277. 



Porter (Prof. A. W.) on the lagging 

 of pipes and wires,- 511. 



Positive electricity, on rays of, 752. 



electrification due to heating 



aluminium phosphate, on, 573. 



Potential energy, on molecular and 

 electronic, 249. 



Prescott (J.) on the effect of radial 

 forces in opposing the distortion 

 of an elastic sphere, 437. 



Pressures, on partial, in liquid mix- 

 tures, 97. 



Pupil of eye, on a means of measur- 

 ing the apparent diameter of the, 

 in \ ery feeble light, 966. 



Radiant emission from the spark, on 

 a new, 707. 



Padiation, on the theory of, 121, 238, 

 350,904 : on the mechanical pres- 

 sure of, 538 ; on the analysis of 

 the, from electron orbits, 642; on 

 non-Newtonian mechanical sys- 

 tems and Planck's theory of, 

 943. 



Radioactivity of the rocks of the 

 Transandine tunnel, on the, 36. 



Radium, on the homogeneity of the 

 y rays of, 243, 383 ; on the rela- 

 tion between uranium and, 340 ; 

 on the ratio between uranium and, 

 in minerals, 345; on the hetero- 

 geneity of the /3 rays from a, thick 

 layer of RaE, 870; on the de- 

 flexion by an electrostatic field of 

 RaB on recoil from RaA, 875; 

 on the deflexion by a magnetic 

 field of RaB on recoil from RaA, 

 882. 



emanation, on the amount of, 



in the atmosphere, 1 : on the ab- 

 sorption of, by coconut charcoal, 

 778 ; on the volatilization of, at 

 low temperatures, 955. 



Rayleigh (Lord) on the finite vibra- 

 tions of a system about a configu- 

 ration of equilibrium, 450; on the 

 problem of the whispering gallery, 

 1001. 



