922 



INDEX. 



liquids, on the absorption of /3 rays 

 by, 605. 



Lowell (Dr. P.) on photographs of 

 Jupiter taken at the Lowell 

 Observatory, 488; on the limits 

 of the oblateness of a rotating 

 planet, 700. 



McAulay (Prof. A.) on spontaneous 

 generation of electrons in an 

 elastic solid aether, 129. 



Magnetic field, on the electrostatic 

 effect of a changing, 461 : on the 

 change of resistance of metals in a, 

 685. 



Makower (Dr. W.) on the recoil of 

 radium from radium B, 100. 



Man- (Dr. J. E.) on the Howgill 

 fells, 447. 



Materials, tests of brittle, under 

 combined stress, 908. 



Mennell (F. P.) on the geological 

 structure of Southern Rhodesia, 

 822. 



Metals, on the change of resistance 

 of, in a magnetic held, 665. 



Millikan (Prof. R. A.) on a new 

 modification of the cloud method 

 of determining the elementary 

 electrical charge and the most 

 probable value of that charge, 

 209. 



Molecular diameters, on, 25. 



Molecules. and atoms, on the nature 

 of the forces of attraction between, 

 783 ; on the radius of the sphere 

 of action of, 840. 



Muff (H. B.) on the cauldron sub- 

 sidence of Glen Coe, 334. 



Nettleton (H. R.) on a new method 

 of determining thermal conduc- 

 tivity, 587. 



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

 tive resistance and inductance of 

 a helical coil, 77 ; on the asymp- 

 totic expansions of Bessel func- 

 tions, 228 ; on the bending of 

 electric waves round the earth, 

 276, 435, 757 ; on the bending of 

 electric waves round a large 

 sphere, 516 : on the size of the 

 tail-particles of comets, and their 

 scattering effect on sunlight, 626. 



Oblateness, on the limits of the, of 

 a rotating planet, 700. 



Optical method of reading the tor- 

 sional angle of a rotating shaft, on 

 an, 300. 



Optical systems, on the sine con- 

 dition in relation to the coma of, 

 356. 



Orstrand (C. E. Van) on reversion of 

 power series, 366. 



Overstrain, on effects of bending, in 

 soft iron wires, 619. 



Pendulum, on the motion of a, 

 swinging through an arc of finite 

 magnitude, 851. 



Perrin (Prof. J.) on the charge of 

 the electron, 438. 



Perry (Prof. J.) on telephone cir- 

 cuits, 673. 



Photometer, on the physiological 

 principles underlying the flicker, 

 58. 



Pianoforte strings, on the striking 

 point of, 648. 



Piper (S. H.) on secondary homo- 

 geneous X radiation, 897. 



Pirani's method of measuring self- 

 inductance, on, 439. 



Pitchblende, on the rate of evolution 

 of heat by, 314. 



Planet, on the limits of the oblate- 

 ness of a rotating, 700. 



Planetary distances, on a new binary 

 progression of the, 597. 



Pleochroic halos, on, 327, 630. 



Polarization of dielectrics in a steady 

 field of force, on the, 390. 



Polonium, on the rate of decay of the 

 radioactivity of, 905. 



Poole (H. H.) on the rate of evolu- 

 tion of heat by pitchblende, 314. 



Porous plug, on the inversion-points 

 for a fluid passing through a, 888. 



Porter (Prof. A. W.) on the inver- 

 sion-points for a fluid passing 

 through a porous plug, 888. 



Positive electricity, on rays of, 424. 



Potassium vapour, on the absorption 

 spectrum of, 195. 



Power series, on reversion of, 366. 



Probability, on Boltzmann's law of, 

 712. 



Pump, on an automatic Toepler, 863. 



Quartz, on the polarization of, in a 

 steady field of force, 392. 



Radioactive minerals in common 

 rocks, on, 903. 



Radioactivity of polonium, on the 

 rate of decay of the, 905. 



Radium, on the absorption of /3 rays 

 from, by solutions and liquids, 

 605. 



