[ 827 ] 



INDEX to VOL. XL, 



ALLEN (Dr. II. S) on optical 

 rotation, optical isomerism, and 

 the ring electron, 426. 



Anderson (Prof. A.) on a method of 

 finding the scalar and vector po- 

 tentials due to the motion of 

 electric charges, 228; on the orbit 

 of a planet, 49!) ; on the advance 

 of perihelion of a plant, (570. 



Anemometer, on the hot-wire, 640. 



Antimony, on the crystalline struc- 

 ture of, 233. 



Applebev (M. P.) on the equation of 

 state, '197. 



Arcs, on the ignition of gases by, 

 450 ; on the pressure on the poles 

 of, 511, 780 ; on alternating-cur- 

 rent carbon, 781. 



Arsenic, on the mass-spectrum of, 

 632. ' 



Aston (Dr. F. W.) on the mass- 

 spectra of chemical elements, 628. 



Atomic nucleus, on the charge on 

 the, 734. 



theory and low voltage arcs in 



caesium vapour, on, 80. 



Atoms, on the arrangement of, in 

 crystals, 169; on the scattering of 

 light by unsymmetrical, 393; on 

 the dimensions of, 516. 



Bailey (Miss D.) on the ionization 

 velocity for electrons' in helium, 

 140. 



Baly (Prof. E C. C.) on light ab- 

 sorption and fluorescence, 1, 15. 



Barnett (Prof. S. J.) on a double 

 solenoid for the production of 

 uniform magnetic fields, 519. 



Bartlett (A. C.) on radiation from a 

 cylindrical wall, 111. 



Barton (Prof. E. II.) on triple pen- 

 dulums with mutual interaction, 

 611. 



Basu (S. N.) on the quantum theory 

 of spectral emission, 619. 



Beatty (Dr. Ii. T.) on the measure- 

 ment of changes in resistance by 

 a valve method, _ ( .>1 . 



Bell (II.) on the helium-bydrogi n 

 .-cries constants, 48 '. 



Bismuth, on the lubrication of, 201. 



Boltwood (B. B.) on the relative 

 activity of radium and uranium, 50. 



Books, new : — Bairstow's Applied 

 Aerodynamics, 164; Muir's The 

 Theory of Determinants in the 

 historical order of development, 

 165; Edridge-Green's the Physio- 

 logy of Vision, 166; Edridge- 

 Green's Card Test for Colour- 

 Blindness, 166 ; Makower and 

 Geiger's Mesures pratiques en 

 Radioactivity 168 ; the Collected 

 Scientific Papers of John Henry 

 Poynting, 388; Whitehead's The 

 Concept of Nature, 389 ; Gray's 

 Treatise on Gyrostatics and Bota- 

 tional Motion, 892; Ewing's Ther- 

 modynamics for Engineers, 678 ; 

 Geddes' Life and Works of Sir 

 Jagadis C. Bose, 678 ; Huygens' 

 Traite de la Lumiere, 679 ; Fow- 

 ler's The Elementary Differential 

 Geometry of Plane Curves, 680 ; 

 Ganganli's Lectures on the Theory 

 of Plane Curves, 680. 



Borelius (Dr. G.) on the electron 

 theory of the metallic state, 746. 



Boron, on the mass-spectrum of, 628. 



Bowen (E. J.) on the rate of chemical 

 action in the crystalline state, 569. 



Bragg (Prof. W. L.) on the arrange- 

 ment of atoms in crystals, 169. 



Bromine, on the mass-spectrum of 

 631. 



Browning (Miss II. M.) on triple 

 pendulums with mutual inter- 

 action, 611. 



Caesium in the sun, on, 815. 



vapour, on atomic theory and 



low voltage arcs in, 80. 



Calcium, on ionization and resonance 

 potentials for elections' in the 

 vapour of, 73. 



Campbell (Dr. N.) on the measure- 

 ment of time and other magni- 

 tudes, 161 ; on the disappearance 

 of gas in the electric discharge, 585. 



Capacity formulae, on the use of 

 vector methods in, 793. 



Carbon arcs, on alternating-current, 

 781. 



