524 



INDEX. 



Thermo dynamical relations, on some, 

 33, 135, 255. 



Thermoelectricity, experiments in, 

 519. 



Thermometers, on the verification of, 

 at the freezing-point of mercury, 

 27 ; on the calibration and stan- 

 dardizing of mercurial, 180; on 

 the determination of the volume of 

 mercury in, 248 ; on delicate calo- 

 rimetric, 330. 



Thompson (Dr. S. P.) on the law of 

 the electromagnet and the law of 

 the dynamo, 1 ; on some new po- 

 larizing prisms, 476. 



Thorpe (Dr. T. E.) on a relation 

 between the critical temperatures 

 of bodies and their thermal expan- 

 sions as liquids, 431. 



Threlfall (R.) on the theory of ex- 

 plosions, 165. 



Tin cells, on the electromotive force 

 of certain, 13. 



Tomlinson (C.) on supersaturated 

 saline solutions, 417; on a new 

 theory of dew, 483. 



Tuning-forks, on measuring the vi- 

 bratory periods of, 285. 



Unwin (W. 0.) on the relations of 

 pressure, temperature, and volume 

 in saturated vapours, 299. 



Vapour and mist, observations on, 

 451. 



Vapours, on the relations of pressure, 

 temperature, and volume in satu- 

 rated, 299. 



Vautier (M.) on the velocity of efflux 

 of liquids, 285. 



Voltaic arc, on the resistance in the, 

 366. 



— cell, on the seat of the electro- 

 motive forces of a, 51, 263 ; on 

 measurements of the electromotive 

 force of a constant, 409. 



Voltmeters, on the winding of, 100. 



Warburg (E.) on the weight and the 

 cause of the layer of water on glass 

 and other bodies, 452. 



"Whipple (G. W.) on the verification 

 of thermometers, 27. 



Whitaker (W.) on the deep-seated 

 geology of the London Basin, 77. 



Wiedemann (Prof. G.), magnetic ob- 

 servations by, 449. 



Wilde (H.) on the efflux of air as 

 modified by the form of the dis- 

 charging orifice, 494. 



Winkelmann (A.) on the diffusion of 

 gases, 451. 



Wire, on the cooling of a, when 

 stretched, 80. 



Witchell (E.) on the basement-beds 

 of the Inferior Oolite of Glouces- 

 tershire, 363. 



Woeikoff (Dr. A.) on Dr. Croll's 

 hypotheses on geological climates, 

 223. 



World, map of the, on Flamsteed's 

 projection, 415. 



Wynne (A. B.) on a fossiliferous 

 pebble-band in the Punjab, 513. 



Young (Dr. S.) on some thermody- 

 namical relations, 33, 135. 



Zott (A.) on the permeability of 

 various diaphragms, 288. 



END OF THE TWENTY-FIRST VOLUME. 



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



