560 



INDEX. 



magnetization on the electric con- 

 ductivity of nickel and of iron, 469 ; 

 on the electric conductivity of com- 

 mercial copperofvariouskinds, 472; 

 on the thermal effects of fluids in 

 motion, 477 ; on the alterations of 

 temperature accompanying changes 

 of pressiu"e in fluids, 541. 



Titanium, on the affinity of, for ni- 

 trogen, loy. 



Tremolite, pseudomorphic, observa- 

 tions on, 180. 



Triethylamine,on the formation of,70. 



Trinitroacetonitrile, on the action of 

 water on, 302. 



Troost (M.) on a new method of 

 taking vapour-densities, 458. 



Tungsten, on the nitruret of, 488. 



Tyndall (Prof. J.) on the structure 

 and motion of glaciers, 365. 



Valentin (G.) on the torpidity of the 

 marmot, 488. 



Vapour, on the tension of aqueous, 212. 



Vapour-densities, on a new method 

 of taking, 458. 



Vaughan (D.) on the solar spots and 

 the variable stars, 359. 



Verdet (M.) on the optical ])roperties 

 developed in transparent bodies by 

 the action of magnetism, 409. 



Vesuvians, on the composition of, 160. 



Volcanos, on the evolution of am- 

 monia from, 233. 



Voltaic current, on the decomposition 

 of lead-salts by the, 78. 



Water, action of metals on, 48. 



Waters, mineral, on the occurrence 

 of organic acids in, 114. 



Waterston (J. J.) on capillarity, and 

 its relation to latent heat, 1 ; on 

 the evidence of a graduated differ- 

 ence between the thermometers of 

 air and mercury below 100° C, 21 2; 

 on the integral of gravitation and 

 its consequents with reference to 

 the measure and transfer, or com- 

 munication of force, 329. 



Weber (M.) on the prejiaration of the 

 iodide of aluminium, 117- 



Wetherell (N. T.) on the occurrence 

 of Graphularia IVetherelli, 484. 



Wohler (Prof.) on the affinity of 

 titanium for nitrogen, 109; on 

 some properties of boron, 110; on 

 new silicon compounds, 456 ; on 

 the presence of oxide of silicon in 

 cast iron, 458 ; on the nitrurets of 

 tungsten and molybdenum, 488. 



Wood (S. V.) on tlie extraneous 

 fossils of the red crag, 485. 



Wood-spirit, on the synthesis of, 453. 



Wurtz (M.) on chloride of a;thylene, 

 454. 



Zervas (L.) on the action of sulphuric 

 acid upon anisic and salicylic acids, 

 143. 



Zinc, on new compounds derived 

 from ammonia and, 149. 



Zygomaturus irilobus, observations 

 on, 403. 



END OF THE FIFTEENTH VOLUME. 



PRINTED BY TAYLOR AND FRANCIS, 

 RED LION COURT, FLEET STREET. 



