472 



INDEX. 



ter, 81 ; on a correction sometimes 

 required in curves professing to re- 

 present the connexion between two 

 physical magnitudes, 441. 



Sulphur, on the spectra of, 318. 



dichloride, on the existence of, 



309. 



Sun, on the physical constitution of 

 the, 55. 



Sun-spots, observations on, 75. 



Telegraph-lines, on an arrangement 

 for the discharge of long overland, 

 20 ; on a practical method for de- 

 tecting bad insulators on, 103. 



Temperature, on a decennial variation 

 of, at the Cape, 72. 



Temperatures, on a new method of 

 measuring, 150. 



Thomson (Sir W.), hydrokinetic solu- 

 tions and observations by, 362; 

 on the equilibrium of vapour at a 

 curved surface of liquid, 448. 



Thorpe (Dr. T. E.) on the phosphorus 

 chlorides, 305 ; on the existence of 

 sulphur dichloride, 309 ; on the 

 measurement of the chemical in- 

 tensity of total daylight made at 

 Catania during the total eclipse of 

 18/0, 382. 



Todhunter (I.) on a problem in the 

 calculus of variations, 440. 



Tribe (A.) on a law in chemical dy- 

 namics, 226. 



Uranus, on the spectrum of, 223. 



Vanadyl chlorides, on the, 305. 



Vapour, on the equilibrium of, at a 

 curved surface of liquid, 448. 



Vapours, on the reversal of the lines 

 of the spectra of metallic, 237. 



Vision, on the amount of time neces- 

 sary for, 320. 



Vortex-rings, on the resistance of air 

 to the motion of, 208. 



Waves, on the minimum velocity of, 

 in sea- water, 368. 



Williams (W. M.) on the eruption- 

 theory of the corona, 160. 



Wind, on the influence of, on waves 

 in water supposed frictionless, 368. 



Wojeikof (A.) on the influence of a 

 covering of snow on climate, 156. 



Wolf (Prof.) on the form of the sun- 

 spot curve, 75. 



Young (Prof. C. A.) on the bright 

 lines in the spectrum of the chro- 

 mosphere, 377- 



Zenger (Prof. Ch.V.) on a new steam- 

 gauge, 344. 



END OF THE FORTY-SECOND VOLUME. 



PRINTED BY TAYLOR. AND FRANCIS, 

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