556 



INDEX. 



Thomson (Prof. W.) on secular local 

 changes in the sea-level, 305 ; on 

 the tidal retardation of the earth's 

 rotation, 533. 



Tidal retardation of the earth's rota- 

 tion, on the, 533. 



Todhunter (I.) on a problem in the 

 calculus of variations, 425. 



Tyndall (Prof.) on the black-bulb 

 thermometer, 191; on calorescence, 

 386, 435. 



Urbain (M.) on a method of testing 

 mineral oils, 143. 



Vapour, aqueous, on the absorption 

 of heat by, 510. 



Vapours, on the expansion of satu- 

 rated, 163, 197, 199. 



Villari (M.) on the changes which 

 stretching and the passage of a vol- 

 taic current produce in a magnetic 

 bar, 239. 



Voltaic conduction, note of an expe- 

 riment on, 83. 



Wanklyn (Prof. J. A.) on the doctrine 

 of uniform and constant saturation, 



283 ; on the action of carbonic ox- 

 ide on sodium-ethyle, 505. 



Water, on the expansion of, 149. 



Waterston (J. J.) on voltaic conduc- 

 tion, 83. 



Wartmann (Prof. E.) on the explosive 

 distance of the direct induced cur- 

 rent between electrodes of the same 

 kind, 107. 



Wheatstone's diagram, on the galva- 

 nometer-resistance to be employed 

 in testing with, 364. 



"Wilson (J. JM.) on the diminution of 

 direct solar heat in the upper re- 

 gions of the atmosphere, 104, 261 ; 

 on some problems in chances, 170. 



Wislicenus (Prof. J.) on the origin 

 of muscular power, 485. 



Wulfenite, on the occurrence of, in 

 Kirkcudbrightshire, 253. 



Young (Prof. J. R.) on the demon- 

 stration of Newton's rule, and on a 

 general property of derived poly- 

 nomials, 369, 



END OF THE THIRTY-FIRST VOLUME. 



FEINTED BY TAYLOE AND FEANCIS, 

 RED LION COURT, FLEET STREET. 



13, IS 



