530 



INDEX. 



Colour tests for the estimation of sul- 

 phur and phosphorus in iron or steel, 

 303. 



Comatula, the nervous system of, P. H. 

 Carpenter on, 418. 



Comets, the cause of bright lines in the 

 spectra of, G. J. Stoney on, 251. 



( periodic, of short period, the direct 



motion of, Prof. H. A. Newton on, 272. 



Concretion balls, some curious, derived 

 from a colliery mineral water, T. 

 Andrews on, 312. 



Condenser, the new, by G. S. Hazlehurst, 

 320. 



Constancy of capacity of certain accu- 

 mulators, Dr. A. Muirhead on the, 283. 



Cooke (C. W.) on a galvanometer for de- 

 monstrating the internal current trans- 

 mitted through the liquid within a 

 voltaic cell, 280. 



Cornwall, West, the geological age of the 

 rocks of, J. H. Collins on, 347. 



Cowper (E. A.) on Cowper's writing tele- 

 graph, 520 ; on Cowper's hot blast 

 stove, 522. 



Credit as an asset of a state, Hyde Clarke 

 on, 469. 



Criminal code, the proposed, for England 

 and Ireland, on the feasibility and im- 

 portance of extending to Scotland, Dr. 

 W. N. Hancock on, 479. 



Crinoidal calyx, the nomenclature of the 

 plates of the, P. H. Carpenter on, 333. 



Crosskey (Rev. H. W.) on the erratic 

 blocks of. England, Wales, and Ireland, 

 135 ; on the circulation of underground 

 waters, 155. 



Crucible steel, the manufacture of, H. S. 

 Bell on, 293. 



'Culm' and 'kulm,' Prof. G. A. Lebour 

 on, 352. • 



Curtis (A. H.) on the condition which 

 must be fulfilled by any number of 

 forces directed towards fixed, or mov- 

 able, centres, in order that any given 

 curve shall be described freely by a 

 particle acted on by these forces simul- 

 taneously ; and an analogous problem, 

 290. 



Cyclops, M. M. Hartog on, 376. 



Cyprus, three months in, by S. Brown, 

 450. 



Datum-level of the Ordnance Survey of 

 Great Britain, third report of the Com- 

 mittee appointed to consider the, with 

 a view to its establishment on a surer 

 foundation than hitherto, and to tabu- 

 late and compare other datum-marks, 

 219. 



Davis (J. W.) on Ostracocanthus dila- 

 tatus, gen. et spec, nov., a fossil fish 

 from the coal-measures S.E. of Halifax, 

 Yorkshire, 343 ; on the discovery of 



certain pockets of chipped flints be- 

 neath the peat on the Yorkshire moors, 

 near Halifax, 395 ; on an elaborately 

 finished celt found on the moors near 

 Marsden, 395. 



Dawkins (Prof. W. Boyd) on the erratic 

 blocks of England, Wales, and Ireland, 

 135 ; on the exploration of Kent's 

 cavern, 140 ; on the exploration of cer- 

 tain caves in Borneo, 149 ; on the bone 

 caves of Derbyshire, 337 ; on the geolo- 

 gical evidence as to the antiquity of 

 man, 399. 



Day (St. J. V.) on patent legislation, 

 223. 



Deacon (G. F.) on underground tempera- 

 ture, 40 ; on the datum-level of the 

 Ordnance Survey of Great Britain, 

 and the tabulation and comparison of 

 other datum-marks, 219. 



Deaf, the ' German ' speech and lip read- 

 ing system of teaching the, D. Buxton 

 on, 474. 



Deane (Dr.) on the erratic blocks of 

 England, Wales, and Ireland, 135. 



De Brazza (Comte S.) on the native 

 races of Gaboon and Ogowe, 394 ; on 

 the basin of the Ogow6, 439. 



*De Clermont (M.) on the action of am- 

 moniacal salts on metallic sulphides, 

 309. 



De Ranee (C. E.) on the circulation of 

 underground waters, 155. 



Derbyshire, the bone caves of, Prof. W. 

 Boyd Dawkins on, 337. 



Dewar (Prof.),* Address by, to the Chemi- 

 cal Section, 293; *on vapour densities, ' 

 293 ; *on the synthesis of hydrocyanic 

 acid, 317 ; *on the amount of nitrous 

 acid produced in electric illumination, 

 317 ; *on the kinoline bases, 317. 



Dew- Smith (Mr.) on the occupation of a 

 table at the zoological station at Naples, 

 165. 



Dickinson (J.) on underground tempera- 

 ture, 40. 



*Diphenyl propyl, the synthesis of, R. D. 

 Silva on, 293. 



Dresser (H. E.) on the possibility of esta- 

 blishing a close time for the protection 

 of indigenous animals, 165. 



Duncan (Prof. P. M.), Address by, to the 

 Geological Section, 326. 



Dunn (J. T.) on experiments to deter- 

 mine the thermal conductivities of 

 certain rocks, 58. 



Durand (Dr. T. P.) on the comparative 

 osteology of the arm, 405. 



Dutch expedition to Central Sumatra, 

 Prof. P. J. Veth on the, 434. 



Dynamo-electric machines, improvements 

 in, W. Ladd on, 258. 



Earnshaw (Rev. S.) on etherspheres as a 



