529 



INDEX to VOL. XXXIV. 



i\jR-COAL gas flame, on the origin 

 of the line spectrum emitted by 

 iron vapour in the, 221. 



Airey (Dr. J. R.) on the numerical 

 calculation of the roots of the 

 Bessel function J«(.r) and its first 

 derivate J n '( x ), 189. 



Aluminium, on the absorption of 

 X rays in, 158. 



Anderson (Prof. A.) on the foco- 

 metry of lens-combinations, 76 ; 

 on some pioperties of the mil 

 point of thin axial pencils of light 

 refracted through a symmetrical 

 optical system, 174. 



As n worth (Dr. J. R.) on the ap- 

 plication of van der Waals' 

 equation of state to magnetism, 

 381. 



Astronomical consequences of the 

 .electrical theorv of matter, on, 

 81, 163,321,517. 



Atmosphere, on periodic convection 

 currents in the, 112, 449. 



Atomic frequency and atomic num- 

 ber, on, 478. 



Audibility factor of a shunted tele- 

 phone, on the, 184. 



Barkla (Prof. 0. G.) on the absorp- 

 tion and scattering of X-rays and 

 the characteristic radiations of 

 J series, 270. 



Barton (Prof. E. H.) on vibrations 

 under variable couplings, 246. 



Bateman (Dr. H.) on some funda- 

 mental concepts of electrical 

 theory, 405. 



Batteries, on high-potential, for 

 supplying small currents, 327. 



Ba.zzoni (Dr. C. B.) on the limiting 

 frequency in the spectra of helium, 

 hydrogen, and mercmy in the 

 extreme ultra-violet, 285. 



Berkeley (the Earl of), on osmotic 

 equilibrium, 33, 459. 



Bessel function J,i(:r) and its first 

 derivate, on the roots of the, 

 189. 



Biedermanu (E. A.) on the energy 

 in the electromagnetic field, 142. 



Books, new:— W. H. & L. W. Bragg's 

 X-Rays and Crystal Structure, 

 151. 



Browning (Miss H. M.) on vibra- 

 tions under variable couplings, 

 246. 



Bruins (Dr. E.) on the application 

 of van der Waals' equation of 

 state to magnetism, 380. 



Bullet, on the motion of a, 332. 



Burton (T. H.) on the microscopic 

 material of the Bunter pebble 

 beds, 460. 



Chapman (Dr. S.) on the partial 

 separation by thermal diffusion 

 of gases of equal molecular weight, 

 146. 



Chaundy (T.) on a method of line- 

 coordinates for investigating the 

 aberrations of a symmetrical 

 optical system, 496. 



Chemical affinity, on the nature of, 

 in the combustion of organic com- 

 pounds, 66. 



