774 
Index. 
Glass, its Compressibility, by J. Y. 
Buchanan, 697. 
Globigerinae of “Challenger” Expedi- 
tion, 509. 
Gibson-Craig (Sir William), Obituary 
Notice of, 24. 
Glauconite, 76. 
Goodwin (W. L.), New Bases of the 
Leucoline Series, Part II., 224 ; Part 
III., 256. 
Gramme Magneto - Electric Machine, 
Determination and Measurements of 
the Electromotive Force of, 55, 90. 
Granites, their Weathering, 531. 
Grant (Sir Alexander, Bart.), pro- 
nounces an Eloge of Professor Kel- 
land, President of the Society, 208 ; 
contributes an Obituary Notice of 
Mr John Blackwood, 329. 
Graphitoid Boron, by Dr R. Sydney 
Marsden, 733. 
Gravitational Oscillations of Rotating 
Water, by Sir William Thomson, 92. 
Gray (Asa), Elected an Honorary Fel- 
low, 92. 
Gray (Robert), contributes Obituary 
Notices of Arthur, Marquis of Tweed- 
dale, 348, and of Dr James M‘Bain, 
350. 
on Two Unrecorded Eggs of the 
Great Auk (Alca impennis), with 
Remarks on its former existence in 
Newfoundland, 668. 
Gray (Thomas), on Specific Heat of 
Saline Solutions, 689. 
Griffith (Sir Richard), Obituary Notice 
of, 17. 
Guthrie (Professor Frederick), Note on 
the Colouring of Maps, 727. 
Gutta-Percha, its Elasticity after being 
Boiled in Water, 53. 
Halonia, 44. 
Hannay (J. B.) and Anderson (Robert) 
on the Expansion of Cast Iron while 
Solidifying, 359. 
Harkness (Robert), Obituary Notice of, 
31. 
Harmonics (Spherical), 280. 
Haughtonite, 64, 65. 
Haycraft (J. B.), Physiological Results 
of Temperature Variation, 68. 
Method for the Quantitative De- 
termination of Urea in the Blood, 564. 
Heat (Specific) of Saline Solutions, by 
Thomas Gray, Tokio College, Japan, 
689. 
Heating and Ventilating of Churches 
and other Buildings, by Charles J. 
Henderson, 72. 
Heddle (Professor), Chapters on the 
Mineralogy of /^Scotland. Chapter 
V. The Micas, 64 ; Chapter VI. 
Chloritic Minerals, 76. 
awarded the Keith Prize for 
his Papers on the “ Rhombohedral 
Carbonates ” and on the “ Felspars of 
Scotland,” 62. 
Notes on Boulders in Ayrshire, 
607 ; and in Argyleshire, 608 ; Re- 
marks on his Boulder Explorations, 
626. 
Henderson (Charles J.), Heating and 
Ventilating of Churches and other 
Buildings, 72. 
Henderson (John), Notes on Drift and 
Glacial Phenomena on the Pentland 
Hills, 187, 193. 
Herdman (Dr W. A.), Report on the 
Tunicata of the “Challenger” Ex- 
pedition, 458, 714. 
High - Pressure Steam Thermometers, 
435. 
Home (David Milne) of Milne-Graden, 
LL.D. See under Milne-Home. 
Homaloidal Space, 644. 
Honorary Fellows, Session 1878-79, 
3, 92 ; Session 1879-80, 319. 
Hospital of St John at Jerusalem, 487. 
Hullite, 77. 
Hyperbolic (Infinite) Space, 645. A 
Plane in Hyperbolic Space may be 
divided into a Network of Regular 
Polygons, 651. 
Hyperbolic Space. — In Hyperbolic Space 
there are two parallels through a given 
point to a given straight line, 652. 
Trigonometry of Hyperbolic Space, 
660. 
Hyperbolic Triangle, 649. 
Iceland, Destruction of the Great Auk 
there, 679. 
Ightham House, Kent, Account of 
Salmon Disease there, 372. 
“Iliad,” Professor Geddes’s'Theory of the 
“ Iliad,” by Professor Blackie, 103. 
India-Rubber, its Elasticity at Different 
Temperatures, by Professor Tait, 2, 
92. 
Instrument for Detecting Coal Gas in 
Coal Mines, by Professor George 
Forbes, 365. 
Integrals. — On Methods in Definite 
Integrals, by Professor Tait, 271. 
Iris, the Action of Light on, by 
William Akroyd, 37. 
Iron, its Expansion while Solidifying, 
by J. B. Hannay and Robert Ander- 
son, 359. 
