INDEX. 



'91 



Harker (Allen), report on the occupation 

 of the table at rhe zoological station 

 at Naples, 182. 

 Harley (Rev. R.) a contribution to the 

 historj of the algebra of logic, 659 ; 

 *on dillerential resolvents, 565. 



Harris (G.) on the utilisation of the 

 memory, 699 ; on the cultivation of 

 the senses, ib. 



Harrison (J. Park) on the work of the 

 Anthropometric Committee, 225 ; *on a 

 collection of racial photographs, 693 ; 

 on some late Celtic engravings on a 

 slate tablet found at Towyn, 701 ; on 

 the profile of the Danes and Germans, 

 703. 



Hart (S. L.) on potential due to con- 

 tact, 555. 



Hartlaub (Dr. G.) on the steps taken for 

 investigating the natural history of 

 Socotra, 194. 



Hartley (Prof. W. N.) on the present 

 state of our knowledge of spectrum 

 analysis, 317. 



Haughton (Rev. Dr.) on the calculation 

 of sun-heat coefficients, 89 ; on the 

 exploration of the caves of the South 

 of Ireland, 218 ; on the effects of 

 oceanic currents upon climates, 451 ; 

 *on the effects of the lunar and solar 

 tide in increasing the length of the 

 sidereal day, 523. 



Hawksley (T.) on the pressure of wind 

 upon a fixed plane surface, 480. 



Herschel (Prof. A. S.) on underground 

 temperature, 90 ; on experiments to 

 determine the thermal conducti^'ities 

 of certain rocks, 126 ; on observations 

 of luminous meteors during the year 

 1880-81, 290. 



Heywood (J.) on the manner in which 

 rudimentary science should be taught, 

 and how examinations should be held 

 therein, in elementary schools, 148 ; 

 on the work of the Anthropometric 

 Committee, 225 ; on the free public 

 libraries of Manchester and Notting 

 Hill, London, 769. 



Hick (T.) and W. Cash on a fossil-stem 

 from the Halifax coal-measures, 679. 



Hicks (W. M.) on recent progress in 

 hydrodynamics : Part I., 57. 



*High molecular weights, the inferences 

 deducible from, as exhibited by the 

 oxides of manganese. Prof. W, Od- 

 ling on, 582. 



Hill (Rev. E.) on evaporation and eccen- 

 tricity as co-factors in glacial periods, 

 631. 



*Hirst (Dr.) on congruencies of the 

 second order and second class, 534. 



Hobkirk (C. P.) on some points in the 

 develo'pmentotOiiiuin'farei/alis(lAnn.), 

 675. 



Hockin (C.) on standards for use in 

 electrical measurements, 423. 



Hodgkinson (Dr. W. R. E.) on the 

 method of determining the specific re- 

 fraction of solids from their solutions, 

 155. 



*Holmes (J.) on certain discoveries of 

 bronze implements in and about 

 Leeds, 703. 



*Homographies in a straight line and 

 points in a space, a connection be- 

 tween, C. Stephanos on, 538. 



Hooker (Sir J. D.) on the steps taken 

 for investigating the natural history of 

 Socotra, 194 ; Address bj^, to the Geo- 

 graphical Section, 727. 



Hopkinson (Dr. J.) on standards for use 

 in electrical measurements, 423. 



Hopkinson (J.) on some points in the 

 morphology of the rhabdophora, 649. 



Hot-lake district, the, and the glacier 

 scenery and fjords of New Zealand, 

 W. Lant Carpenter on, 742. 



Hewlett (Rev. F.) on the general coinci- 

 dence between sun-spot activity and 

 terrestrial magnetic disturbance, 541. 



*Hoyle (W.) the economic influence of 

 the drinking customs upon the nation's 

 well-being, 760. 



Hubrecht (Dr. A. A. W.) on the affini- 

 ties of proneomenia, 673. 



Hudson's Bay, the commercial import- 

 ance of. Dr. R. Bell on, with remarks on 

 recent surveys and investigations, 745. 



Huggins (W.) on the photographic spec- 

 trum of comet ' b,' 1881, 520. 



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

 blocks of England, Wales, and L:e- 

 land, 204 ; on the Lower Cambrian of 

 Anglesea, 643; on the gnarled series 

 of Amlwch and Holyhead in Anglesea, 

 614; exhibition of a Roman bronze 

 galeated bust, 701 ; exhibition of four 

 bronze socketed spears, probably an- 

 cient, from China, ib. ; on a supposed 

 inscribed stone, near Llanerchymedd, 

 in Anglesea, ib. 



and Mrs. Williams Wynn, the re- 

 sults of recent further excavations in 

 the caves of Cefn, near St. Asaph, 

 North Wales, 700. 



Hull (Prof. E.) on underground tempera- 

 tiure, 90 ; on the circulation of under- 

 ground waters, 309 ; on the Laurentian 

 beds of Donegal and of other parts of 

 Ireland, 609 ; on the Devono-Sllurian 

 formation, 631 ; observations on the 

 two types of Cambrian beds of the 

 British Isles (the Caledonian and Hi- 

 berno- Cambrian), and the conditions 

 under which they were respectively 

 deposited, 642. 



Hungary, the stature of the inhabitants 

 of. Dr. Beddoe on, 689. 



