560 



INDEX. 



Thallium, simple method of prepa- 

 ring, 168 ; od the phosphates of, 

 379. 



Thermo-electric piles of great energy, 

 on some, 159. 



Thermo-element, on a new, 406. 



Tin, analysis of native, 133. 



Tollens(M.) on the synthesis of hydro- 

 carbons of the benzole series, 311. 



Torsion, on the work or potential of, 

 61. 



Tyndall (Prof.) on the history of ne- 

 gative fluorescence, 44, 218 ; on 

 combustion by invisible rays, 241. 



Valleys, on the origin of the Alpine, 

 206. 



Vapour- densities, note on, 111. 



Vapours, on the elasticity of, 283 \ 

 on the reversal of the spectra of 

 metallic, 338. 



Vogt (M.) on naphthylmercaptan, 

 530. 



Waltenhofen (Prof. A. von) on an 

 anomalous magnetizing of iron, 

 1 lo. 



Wanklyn (Prof. J. A.) on vapour- 

 densities, 111; on the constitution 

 of chromium-compounds, 313. 



Waringtonite, description of the new 

 mineral, 475. 



Waterston (J. J.) on some electrical 

 experiments and inductions, 81, 

 192, 370. 



Weltzien (M.) on the estimation of 

 nitric acid in waters, 378. 



Weselsky (M.) on a method of ex- 

 tracting indium, 328. 



Williamson (Prof. A. W.) on the unit- 

 volume of gases, 188 ; on the atomi- 

 city of aluminium, 395 ; on chemi- 

 mical nomenclature, 464. 



Wurtz (M.) on diallyle, 311. 



Yttria, researches on, 374. 



END OF THE TWENTY-NINTH VOLUME. 



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