676 



INDEX. 



cosities of mixtures of liquids and, 

 128 ; on a theory of colloidal, 647. 



Sound, on the refraction of, by wind, 

 159 ; on the propagation of, 

 between parallel walls, 301. 



Sowter (R. J.) on astigmatic lenses, 

 239. 



Sparking distances between plates, 

 on the, 147. 



Spectra of carbon compounds, on 

 the, 476. 



Spectroscopic notes concerning the 

 gases of the atmosphere, 100. 



Spectrum, on the production of a 

 bright-line, by anomalous dis- 

 persion, 551. 



Stresses in solid bodies due to 

 unequal heating, on the, 169. 



Striated electrical discharge, on the, 

 521, 



Strutt (Hon. R. J.) on the tendency 

 of the atomic weights to approx- 

 imate to whole numbers, 311. 



Swan spectrum, on the, 476. 



Symmetry, on crystal, 1. 



Thomson' (Prof. J. J.) on radiation 

 produced by cathode-rays, together 

 with a theory of the negative 

 glow, the dark space, and the 

 positive column, 361. 



Townsend (Prof. J. S.) on the con- 

 ductivity produced in gases by 

 the motion of negatively charged 

 ions, 198, 630. 



Tramways, on die magnetic field 

 produced by electric, 423, 432. 



Travers (Dr. M. W.) on the lique- 

 faction of hydrogen, 411 . 



Turpentine, on the specific ionic 

 velocities in, 83. 



Van der Waals' equation, note on, 

 579. 



Villari (Prof. E.), how air subjected 

 to .r-rays loses its discharging 

 property, 535. 



Viscosities of mixtures of liquids 

 and solutions, on the, 128. 



Walker (W. E.) on the specific 

 velocities of ions in the discharge 

 from points, 79. 



Warrington (A. W.) on hydro- 

 meters of total immersion, 360. 



Waves, on progressive long, in 

 shallow water, 106 ; on indices 

 of refraction for electric, 179 ; on 

 the double refraction of electric, 

 548 ; on the propagation of cusped, 

 589; on the velocity of electric, 

 along wires, 6. 



Wedd (C. B.) on Corallian rocks of 

 Els worth, 669. 



W'ehnelt's interruptor, on the func- 

 tion of self-induction in, 246. 



Willows (Dr. R. S.) on the effect of 

 a magnetic field on the discharge 

 through a gas, 250 ; on the ab- 

 sorption of gas in a Crookes tube, 

 503. 



Wind, on the refraction of sound bv, 

 159. 



Wires, on the propagation of poly- 

 phase currents along parallel, 563 ; 

 on the velocity of electric waves 

 along, 6. 



Wood (Prof. R. W r .) on the ano- 

 malous dispersion of cyanin, 36 ; 

 on the anomalous dispersion (if 

 carbon, 405 ; on the production of 

 a bright-line spectrum by ano- 

 malous dispersion and its appli- 

 cation the flash-spectrum, 551 ; 

 on the propagation of cusped 

 waves, 589 ; on cyanin prisms 

 and a new method of exhibiting 

 anomalous dispersion, 624 ; on a 

 mica echelon grating, 627. 



.r-rays, on air subjected to, 535. 



Zahm (Dr. A. F.) on the resistance 

 of the air at speeds below 1000 

 feet a second, 530. 



END OF THE FIRST VOLUME. 



Printed by Taylor and FitANcrs, Red Lion Court, Fleet Street. 



