INDEX. 



651 



Tomlinson (C.) on the action of low 

 temperatures on supersaturated solu- 

 tions of Glauber's salt, 109. 



on the behaviour of supersaturated 



saline solutions when exposed to the 

 open air, 41. 



and Mensbrugghe (Gr. Van der) on 



supersaturated saline solutions : Partlll. 

 On a relation between the surface- 

 tension of liquids and the supersatura- 

 tion of saline solutions, 342. 



Tylor (E. B.), admitted, 1. 



Uramidobenzoic acid, on some derivatives 

 of, 168. 



Urine, on ammonia in the, in health and 

 disease, 362. 



Varley (C. R), admitted, 27. 



Velocity of sound, experimental determi- 

 nation of the, 34. 



Vice-Presidents appointed, 66. 



Volcanic energy, an attempt to develope its 

 true origin and cosmical relations, 438. 



Voltaic standard of electromotive force, on 

 a, 444. 



Waller (A.), obituary notice of, xi. 

 Water, on the decomposition of, by zinc, 

 218. 



Waves of light, corrections to the com- 

 puted lengths of, 21. 



Weather and explosions in collieries, on 

 the connexion between, 292. 



Whitehouse (W.) on a new hygrometer, 

 180. 



Williamson (W. C.) on the organization 

 of the fossil plants of the coal-measures : 

 Part III. Lycopodiacece, 199. 



, notice of further researches among 



the plants of the coal-measures, 95, 

 435. 



Wolf (Pk.)> value of sun-spot period, 85. 



Wright (C. E-. A.), contributions to the 

 history of the opium alkaloids : Part III., 

 8; Part IV., 203 ; Part V., 278. 



Yates (J.), obituary notice of, i. 



Zenith-sector, short note on the per- 

 formance of a, 317, 372. 

 Zinc, the decomposition of water by, 218. 



END OF THE TWENTIETH VOLUME. 



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