920 



INDEX. 



Damma Island and Its natives, b)^ P. W. 

 Bassett-Smith, 903. 



Darwin (Prof. G. H.) on the advisability 

 and possibility of establishing obser- 

 vations upon the prevalence of earth 

 tremors, 343. 



Davidson (M.), taxation of building land, 

 843. 



Davis (J. W.) on the cave at Elbolton, 

 266; on the collection, preservation, 

 and systematic registration of photo- 

 graphs of geological interest in the 

 "United Kingdom, 290. 



Davison (C.) on the advisability and pos- 

 sibility of establishing observations 

 upon the prevalence of earth tremors, 

 343. 



Dawkins (Prof. W. Boyd) on the work of 

 the Corresponding Societies Committee, 

 29 ; on the erratic blocks of England, 

 Wales, and Ireland, 267 ; on the col- 

 lection, preservation, and systematic 

 registration of photographs of geologi- 

 cal interest in the United Kingdom, 

 290. 



Dawson (Dr. G. M.) on the North-western 

 tribes of the Dominion of Canada, .545. 



Day (J.) on a new forra of gas engine, 

 884. 



Deacon (G. F.) on underground tempera- 

 ture, 129 ; on shield tunnelling in loose 

 ground under water pressure, with 

 special reference to the Vyrnwy aque- 

 duct tunnel under the Mersey, 532. 



Deep-sea tow-net for opening and 

 closing under water, report of the 

 Committee for improving and experi- 

 menting with a, 366. 



De Guerne (Baron J.), *presentation de 

 planches inedites de zoologie concer- 

 nant les recherches du yacht I'Hiron- 

 delle, 785 ; *crustac4s copepodes des 

 eaux sursaturees de sel de la France et 

 des Canaries, ib. 



*Demolins (M.), la science sociale et sa 

 methode, 835. 



Density of illumination, proof that it 

 does not afFect absorption, by Dr. 

 W. Peddie, 661. 



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

 underground waters, 264 ; on the er- 

 ratic blocks of England, Wales, and 

 Ireland, 267. 



*Deslructors, the application of, espe- 

 cially to the electric lighting of Edin- 

 burgh, by Prof. G. Forbes, 860. 



Devon and Cornish granites, the, by 

 W. A. E. Ussher, 709. 



Dewar (Prof.) on researches on the ultra- 

 violet rays of the solar spectrum, 74 ; 

 on wave-length tables of the spectra of 

 the elements and compounds, 193. 



* and Prof. G. D. Livcing on the 



spectrum of liquid 033'gen, and on the 



refraction indices of liquid oxygen, 



nitrous oxide, and ethylene, 658. 

 Dickson (H. N.), physical conditions of 



the waters of the English Channel, 661 ; 



on the'need for teaching in meteoro- 

 logy, 813. 

 Dicynodont and other reptile remains 



from the Elgin sandstone, E. T. New- 

 ton on some, 723. 

 Dielectric of condensers, W. H. Preece on 



the, 654. 

 *Diffusion, researches on, by Dr. S. 



Arrhenius, 679. 

 Dioptric lens, the, as used in lighthouse 



illumination, the progress of, C. A. 



Stevenson on, 879. 

 Dispersion in double refraction due to 



electric stress. Dr. J. Kerr on, 157. 

 Disposal of refuse, the, by G. Watson, 



860. 

 Dixon (Prof. H. B.) on electrolysis in its 



physical and chemical bearings, 72. 

 Dobbin (Dr. L.) and Dr. J. Walker, the 



halogen addition products of salts of 



organic bases, 681. 

 Dredge (J.) and R. S. McCormick, the 



World's Columbian Exposition for 



1893, 858. 

 * Dredgers, by A. Brown, 879. 

 *Druery (C. T.) on an aposporous fern 



seedling, 747. 

 Du Bois (Dr. H. E. J. G.) on leaky mag- 

 netic circuits, 636 ; on a magnetic 



balance and its practical use, 654 ; on 



polarising gratings, 660. 

 Dugong, the Australian, the skeleton and 



teeth of. Prof. G. B. Howes and J. 



Harrison on, 790. 

 Duller (Col. E.), a system of purifying 



the smoke from domestic and other 



fires, 880. 

 Dunlop (Dr. A.), a contribution to the 



ethnology of Jersey, 902. 

 Dunstan (Prof. W. R.) on the formation 



of haloids from pure materials, 262. 

 Durham (W.) on valency or atomicity, 



092. 

 Dyed colours, the action of light upon, 



provisional report on, 263. 

 Dynamical problems, graphic solution of. 



Lord Kelvin on, 648. 

 Dynamics, conservative, reduction of 



every problem of two freedoms in, to 



the drawing of geodetic lines on a 



surface of given specific curvature, by 



Lord Kelvin, 652. 



Ear, the external, a use of. Prof. A. 

 Crura Brown on, 754. 



Earth currents, by W. H. Preece, 656. 



Earth tremors, the prevalence of, report 

 on the advisability and possibility of 

 establishing in other parts of the coun- 

 try observations upon, similar to those 



