456 



INDEX. 



Rood (Prof. 0. N.) on the effects 

 produced by mixing white with 

 coloured light, 209. 



Snccharimeter, on a simple form of, 

 18. 



Serpentine rocks of Anglesey, on the, 

 447. 



Shida (E.) on the number of electro- 

 static units in the electromagnetic 

 unit, 431. 



.Sodium vapour, on anomalous dis- 

 persion in incandescent, 53. 



Spectroscopic observations, 123, 212. 



Spheres, on induction in rotating, 

 451. 



Stars, on a means to determine the 

 pressure at the surface of the, 123. 



Stroud (W.) on a modification of 

 Bunsen's calorimeter, 171. 



Strouhal (V.) on a simple method 

 of galvanic calibration of a wire, 

 60. 



Sun, on a means to determine the 

 pressure at the surface of the, 123. 



Telegraph-cable, on a method of 

 identifying a submerged, without 

 cutting it, 69. 



Telescopes, on the resolving-power 

 of, 116. 



Thermometer, on a demonstration- 

 differential, 143. 



Thomas (B. F.) on Edison's paper- 

 carbon electric lamp, 21. 



Thomson (Sir W.) on vortex statics, 

 97; on gravitational oscillations of 

 rotating water, 109 ; on vibrations 

 of a columnar vortex, 155. 



Thoulet (J.) on the determination of 



the specific gravity of small frag- 

 ments of minerals, 297. 



Tourmaline crystals, on the conduc- 

 tivity of, 67. 



Troost (L.) on the density of the va- 

 pour of iodine, 141. 



Universal change, on the finality of, 

 338. 



Vapour-densities, on an acoustic me- 

 thod of determining, 300. 



Vapours, on the absorption of radiant 

 heat by, 210. 



Venn (J.) on the diagrammatic and 

 mechanical representation of pro- 

 positions and reasonings, 1. 



Vibrations, on the resultant of a 

 large number of, of the same pitch 

 and of arbitrary phase, 73 ; of a 

 film in reference to the phoneido- 

 scope, on the, 79. 



Vibratory motions, on a simplifica- 

 tion of the theory of, 57. 



Vortex, on vibrations of a columnar, 

 155. 



statics, on, 97. 



"Water, on gravitational oscillations 

 of rotating, 109. 



Wiedemann (Prof. E.) on a means to 

 determine the pressure at the sur- 

 face of the sun and stars, 123 ; on 

 the thermic and optical behaviour 

 of gases under the influence of the 

 electric discharge, 357, 407. 



Winstanley (D.) on air-thermome- 

 ters, 380. 



Young (Prof. C. A.) on the thermo- 

 electric power of iron and platinum 

 in vacuo, 450. 



END OF THE TENTH VOLUME. 



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