916 



INDEX. 



lerel shell-hearing deposits at Clava, 

 Chapelhall, and other localities, 483. 



Howard (P. T.) and E. W. Small on 

 some igneous rocks of South Pembroke- 

 shire, and on the rocks of the Isle of 

 Grassholme, 766. 



HoWLBTT (Rev. F.) on Wilson's theory 

 respecting the asserted foreshortening 

 of the inner side of the penumbrse of 

 the solar spots when near the sun's 

 limb, and of the probable thickness of 

 the photospherio and also penumbral 

 strata of the solar envelopes, 686. 



HoYLB (W. E.) on the marine zoology of 

 the Irish Sea, 626. 



on the luminous organs of cephalo- 

 poda, 802. 



Hughes (Prof. T. McK.") on the erratic 

 hlochs of England, Wales, and Ireland, 

 514. 



Hull (Prof. E.) on earth tremors, 287 ; 

 on the circulation, of vnderr/round 

 waters, 463 ; o?i the erratic blocks of 

 England, Wales, and Ireland, .514. 



on the water-bearing capacity of 



the New Red Sandstone of Notting- 

 ham, 743. 



on the discovery of a concealed ridge 



of pre-Carboniferous rocks under the 

 Trias of Netherseal, Leicestershire, 745. 



on the ' Him lack ' stone near 



Nottingham, 769. 



Hummel (Prof. J. J.) on the action of 

 light of vpon dtjed colours, 373. 



Hurst (C. H.) on the wings of archas- 

 opterys and of other birds, 810. 



Ifydracids of the halogens, the action of 

 light on the, in presence of oxygen, 

 report on, 381. 



HydrograjMeal and climatological condi- 

 tions of tropical Africa, second report 

 on the, 572. 



IDDINGS (Prof. J. P.) on the dissected 

 volcano of Crandall Basin, Wyoming, 

 753. 



on the petrological features of the 



dissected volcano of Crandall Basin, 

 Wyoming, 763. 



Igneous rocks, Berthelot's principle ap- 

 plied to magnetic concentration in, 

 Alfred Harker on, 765 



intermediate varieties of, the origin 



of, by intrusion and admixture, as 

 observed at Barnavave, Carlingford, 

 Prof. W. J. Sollas on, 765. 



of South Pembrokeshire, F. T. 



Howard and E. W. Small on some, and 

 on the rocks of the Isle of Grassholme, 

 766. 



Immigration, the net, from the rest of 



, the country into the great towns of 

 England and Wales, 1871-91, Edwin 

 Cannan on the diminution of, 851. 



Index generum et speciervm animalium, 



report on the compilation of an, 553. 

 *Index numbers, S. Bourne on, 851. 

 India, a geological map of, R. D. Oldham 



on, 756. 

 and the currency, L. L. Price on, 



858 ; F. C. Harrison on, 859. 

 Indians of the Mackenzie and Yukon 



rivers, Canada, Bishop Bompas on the, 



901. 

 Interference and diffraction phenomena, 



simple apparatus for observing and 



photographing, W. B. Croft on, 685. 

 arrangement, a simple, Lord Ray- 



leigh on, 703. 



phenomena, electrical, somewhat 



analogous to Newton's rings, but exhi- 

 bited by waves in wires, E. H. Barton 

 on, 692. 



phenomena exhibited by the passage 



of electric waves through layers of 

 electrolyte, G. Udny Yule on, 694. 



International standard for the analysis of 

 iron and steel, fifth report on the bai 

 method of establishing an, 437. 



Iodine value of sunliglit in the High 

 Alps. Dr. S. Rideal on the, 718. 



Ireland, the Esker system of, a map of. 

 Prof. W. J. Sollas on, 777. 



Irish Sea, the marine zoology of the, report 

 on, 526. 



Iron and Steel, the bent method of esta- 

 blishing an international standard for 

 the analysis of, fifth report on, 437. 



* manufacture in Bengal, native, H. 



Harris and T. Turner on, 716. 



Iron, nitride of, G. J. Fowler on, 716. 



Irving (Rev. A.) twenty years' work on 

 the younger red rocks (Permian and 

 Trias), 768. 



Isle of Man, the Skiddaw slates of the 

 North of the, H. Bolton on, 770. 



Isomeric naphthalene derivatives, seventh 

 report on the investigation of, 381. 



Jamieson (T. F.) on the character of 

 the high-level shell-bearing deposits at 

 Clava, Chapelhall, and other localities, 

 483. 



Japan, the earthqualie and volcanic plie- 

 nomena of, thirteenth report on, 214. 



* , pictures of, Prof. J. Milne on, 833. 



* , the volcanic phenomena of. Prof. 



J. Milne on the, 771. 



Jeff3 (O. W.) on the collection, preser- 

 vation, and systematic registration of 

 photographs of geological interest in the 

 United Kingdom, 473. 



Johnston-Lavis (Prof. H. J.) on the 

 volcanic phenomena of Vesuvius and its 

 neighbourhood, 471. 



on quartz enclosures in lavas of 



Stromboli and Strombolicchio, and 



