956 



INDE X. 



Systems with propagated coupling, 

 on, 432, 836. 



Taeheometry, on the accuracy of the 

 internally focussing telescope in, 

 890. 



Talbot's bands and the colour se- 

 quence in the spectrum, on, 211. 



Tavani (F.) on motion and hyper- 

 dimensions, 647. 



Taylor ( W. ) on the coalescence of 

 liquid spheres, 877. 



Telescope, on the accuracy of the 

 internally focussing, 890. 



Temperature radiation of gases, on 

 the, 267. 



Thermionic valves, on the design of 

 soft, 470. 



Thomas (Dr. J. S. G.) on the thermal 

 effect produced by a slow current 

 of air flowing past a series of fine 

 heated platinum wires, 240 ; on a 

 null - deflexion constant - current 

 t3 r pe of hot-wire anemometer, 716. 



Thomson (G. P.) on the spectrum of 

 hydrogen positive rays, 566. 



Thomson (Sir J. J.) on the structure 

 of the molecule and chemical com- 

 bination, 510. 



Thorium active deposit, on the distri- 

 bution of, in electric fields, 357 ; 

 on long-range particles from, 575. 



C, on the mass of the long- 

 range particles from, 570. 



Time, on force-transformation, Fres- 

 nel's coefficient, and proper, 652. 



Timoshenko (Prof. S. P.) on the 

 correction for shear of the differ- 

 ential equation for transverse 

 vibrations of prismatic bars, 744. 



Tobin (T. C.) on times of descent 

 under gravity, 225. 



Torsion of closed and open tubes, on 

 the, 568. 



Tubes, on the torsion of closed and 

 open, 568. 



Valves, on the design of soft thermi- 

 onic, 470. 



Vapour pressures and the isother- 

 mals of vapours, on, 441. 



Vector analysis, on integration 

 theorems of four-dimensional, 389. 



Vegard (Prof. L.) on the spectrum 

 of hydrogen positive rays, 558. 



Venturi meter, on the, 286. 



Vibrations of beams, on the, 81 ; 

 on the period of, of a tapering rod r 

 259 ; on a graphical method for 

 determining frequencies of lateral, 

 419 ; on the transverse, of pris- 

 matic bars, 744. 



Viscous flow, on, 286. 



Vision, on a statistical survey of 

 colour, 186; on a quantum theory 

 of, 289 ; on the photo-electric 

 theory of, 347. 



Voltages, on impulsive sparking, in 

 small gaps, 462. 



Walker (Dr. \V. J.) on fluid dis- 

 charges as affected by resistance 

 to flow, 286. 



Warren (S. H.) on a natural eolith 

 factory beneath the Thanet sand,, 

 828. 



Water, on the activity of, in sucrose 

 solutions, 484. 



Wave propagation over parallel 

 wires, on, 607. 



Wedge, on the period of vibration 

 of a truncated, 259 ; on the dis- 

 continuous flow of liquid past a,. 

 801. 



Wells (A. K.) oh the Lower Palae- 

 ozoic rocks of the Arthog-Dolgelly 

 district, 683. 



Whirling of shafts, on the, 81. 



speeds, on a graphical method 



for determining, 419. 



Wires, on wave propagation over 

 parallel, 607 ; on heat loss by 

 convection from, 899. 



Wood (Dr. A. B.) on long-range 

 particles from thorium active de- 

 posit, S^o. 



Wrinch (Dr. D.) on an asymptotic 

 formula for the hypergeometric 

 function A 4 (z), 161 ; on a general- 

 ized hypergeometric function with 

 n parameters, 174. 



X-ray spectra, precision measure- 

 ments in the, 675 ; spectral lines, 

 on the interrelation between beta- 

 ray and, 120 ; on the intensity of 

 reflexion of, by rock-salt, 309 ; 

 on the scattering and absorption 

 of, in the lightest elements, 733. 



Young's modulus, on the deter- 

 mination of, by the method of 

 flexures, 206. 



END OF THE FORTY-FIRST VOLUME. 



Printed by Taylor and Francis, Eed Lion Court, Fleet Street. 



