476 



INDEX to VOL. XXXVIII 



ABICH (M.) on fulgurites in the 

 andesite of Lesser Ararat, and on 

 the influence of local agents in the 

 production of thunderstorms, 436 5 

 on hailstorms in Russian Georgia, 

 440. 



Air, determination of the specific heat 

 of, under constant volume by the 

 metallic barometer, 430. 



Albatros, on the mechanical princi- 

 ples involved in the sailing flight of 

 the, 130. 



Aldis (J. $.) on the nebular hypo- 

 thesis, 308. 



Amaury (M.) on the compressibility 

 of liquids, 164. 



Ammonia compounds, on a theory of 

 condensed, 455. 



Ammonium alloys, on, 57* 



Angstrom (J. A.) on the spectrum of 

 the aurora borealis, 246. 



Arctic regions, on the winterings in 

 the, during the last fifty years, 340. 



Aurora borealis, on the spectrum of 

 the, 246. 



Baily (W. H.) on Irish graptolites, 

 and on plant-remains from beds in- 

 terstratified with the basalt in An- 

 trim, 241. 



Battery, thermal researches on the, 31 0. 



Bauerman (H.) on the geology of 

 Arabia Petrsea, 7^ ', on the occur- 

 rence of celestine in the tertiary 

 rocks of Egypt, 162. 



Beor (E. J.) on the lignite-mines near 

 Volterra, 466. 



Bessemer-flame, on the spectrum of 

 the, 254. 



Bismuth, on the existence of an alloy 

 of ammonium and, 58. 



Blaserna (P.) on the mean velocity of 

 the motion of translation of the mo- 

 lecules in imperfect-gases, 326. 



Blood, on the function of the, in mus- 

 cular work, 15. 



Books, new: — Fitch's Methods of 

 teaching Arithmetic, 457; Cornwell 

 and Fitch's School Arithmetic and 

 Science of Arithmetic, ibid. 



Borgen (C.) on the winterings in the 

 polar regions during the last fifty 

 years, 340. 



Bridgman (W. K.) on the theory of 

 the voltaic pile, 377. 



Broadbent (Dr. W. H.) on the func- 

 tion of the blood in muscular work, 15. 



Browne (G. M.) on floods in the Island 

 of Bequia, 73. 



Camphor, on the motions of, on the 

 surface of water, 409. 



Capillarity of molten bodies, on the 

 constants of, 81. 



Carbon, on the spectra of, 249. 



Carruthers (W.) on the structure and 

 affinities of Sigillaria, 402. 



Cazin (A.) on the expansion of gases, 

 322. 



Challis (Prof.) on the hydrodynamical 

 theory of magnetism, 42; on a 

 theory of the dispersion of light, 269. 



Church "(Prof. A. W.) on turacine, 383. 



Climate, on, 220. 



Clock, on a new astronomical, 393. 



Clouds, on the formation and pheno- 

 mena of, 156. 



Conductors, comparative measure- 



