Compressibility of Glass, by J. Y.
Buchanan, 697.

Conder (Lieut. Claude Reignier), Trigo-
nometrical Survey of Palestine, 379.
on the Topography of Jerusalem,

474.

Contact Electricity, 362.
Coral Reefs and Islands,-their Origin
and Structure, by John Murray, 505;
Darwin's Theory, 505; Professor
Semper's Difficulties in Applying
Darwin's Theory, 506; Nature of
Oceanic Islands and Submarine Eleva-
tions, 506; Pelagic Fauna and Flora
of Tropical Regions, 507; Bathyme-
trical Distribution of the Calcareous
Shells and Skeletons of Surface Or-
ganisms, 509; Coral Atolls, 510;
Barrier Reefs, 513; Elevation and
Subsidence, 515; Summary, 517.
Corella, a genus of Ascidiada ("Chal
lenger" Expedition), 459; Corella
Japonica, n. sp., 472, 716, 718.
ouncil for Session 1878-79, 1; for
Session 1879-80, 315.
Council of the Society-its Constitution,
408; the Council to have power to
Regulate the Private Business of the
Society, 408; Chairman of Council to
have a Casting as well as a Delibera-
tive Vote, 408.

Coxe (Sir James), Obituary Notice of,
15.

Craig (Sir William Gibson), Obituary
Notice of, 24.

Croll (Mr), Notes on Striæ and Boulders
of the Pentlands, 192.

Crustacea (New) from the Cementstone

Group of the Sandstone of Eskdale
and Liddesdale, by B. N. Peach,
711.
Cryophorus. On a Sulphurous Acid
Cryophorus, by Sir William Thomson,
442.

Crystalline Compound formed in Water

containing Sulphuretted Hydrogen
and Mercaptan, 87.

Crystalline Rocks of Firth of Forth, 66.
Cunningham (James), W.S., Obituary
Notice of, 13.
Cynthiadæ, 458.

Dallas (W. Elmslie), Obituary Notice
of, 340.

Darwin (Dr Charles).-His Theory of
Origin of Coral Reefs, 505.
Deep-Sea Thermometers, by J. Y.
Buchanan, 77.

Defect of a Triangle Proportional to

its Area, 648.
Definite Integrals, 271.
Delessite, 77.
Diethylmethyl-sulphine, 254.
Differential Telephone. See Telephone.
Differential Thermoscope, 537.
Differential Steam-Pressure Thermo-
meter, 535.

Disruptive Discharge of Electricity, by
Dr Alex. Macfarlane and P. M. Play-
fair, 50.

Dithionate of Trimethyl-sulphine, 54.
Dome of the Rock at Jerusalem, 481.
Donaldson (Dr) on Professor Geddes's
Theory of the Iliad, 105.
Donations to the Library, 735.
Donders (Frank Cornelius) Elected an
Honorary Fellow, 92.

Dove (Heinrich Wilhelm), Obituary
Notice of, 356.

Duboisia Hopwoodii, 201.
Dudgeon (Patrick), of Cargen, exhibits
Auriferous Quartz from Leadhills Dis-
trict, 67.

Ecteinascidia, n. g., 721; Ecteinascidia
fusca, n. sp., 723; Ecteinascidia tur-
binata, 724.

Edinburgh Churchyards, Rock-Weather.
ing in, by Professor Geikie, 518.
Election of Office-Bearers for Session
1878-79, 1; for Session 1879-80,
315.

Electric Currents produced by Friction
between Conducting Substances, by
James Blyth, 548.

Discharge between a Point and
a Plate, and between a Ball and a
Plate, by Dr A. Macfarlane, 555.

Resistance; its Variation with
Temperature in the case of Alloys, by
Professor M'Gregor and Dr Knott,
714.

Electrical Contact, the Transmission of
Sound by Loose, 272.

Electricity, Disruptive Discharge of, by
Dr A. Macfarlane and P. M. Play-
fair, 50.

Passage of Spark between Equal
Spherical Balls, 50; between Plate
and Ball, 50; between Plate and
Point, 50.

Discharge through a Solid
Dielectric, 50.

Discharge of Electricity through
Olive Oil, 727.

Researches on Contact Elec-
tricity, by Dr C. G. Knott, 362.

dental Notice of, 34.
Formiate of Potassium, 425.
Forth, Carboniferous Volcanic Rocks in
the Basin of the Firth of Forth, by
Professor Geikie, 65, 232.

Equations. A Graphical Solution of the
Equation Vpop=0, by Professor
Tait, 402.

See Simultaneous Equations,

283.
Equidistants, 648, 649, 657; the Equi-
distant is a Self-Congruent Line,
648.

Ether, its Effects on Blood-Pressure,
100.

Ethidene Dichloride, its Effects on Blood-
Pressure, 100.

Ethylmethylethyl-sulphine, 254.
Euclidean Space, 644.

Expansion of Cast-Iron while Solidify-
ing, by J. B. Hannay and Robert
Anderson, 359.

Faroe Islands, their Geology, by Dr
James Geikie, 495; their Glaciation,
499.

Fellows, Honorary, Session 1878-79, 3;
Session 1879-80, 320.

Ordinary, Session 1878-79, 4;
Session 1879-80, 321.
Ferguson (Dr R. M), Note on the Wire
Microphone, 700.

Ferrocyanide of Trimethyl-sulphine,
253.

Firearms, the Bursting of, when the
Muzzle is closed by Snow, Earth,
Grease, &c., by Professor George
Forbes, 254.

Firth of Forth, Carboniferous Volcanic
Rocks of, 65, 232.

Fleming (Dr J. G.), Obituary Notice of,
346.

Foraminifera of "Challenger" Expedi-
tion, 508.

Forbes (Professor George), on the Burst-
ing of Firearms when the Muzzle is
closed by Snow, Earth, Grease, &c.,
254.

Forbes (Professor George) on an Instru-
ment for Detecting Coal Gas in Mines,
365.

on Comets, 426; his Researches
on Comets lead him to believe in the
Existence of Two Planets external to
Neptune, 426.

636.

on an Ultra-Neptunian Planet,

Fossil Fishes, collected in Roxburgh-
shire and Dumfriesshire, by Dr Tra-
quair, 710.

Fragmental Rocks of Firth of Forth, 66.
Fraser (Professor Thomas R.).-The
Pituri Poison of South Australia,
200.
Fries (Elias Magnus), Obituary Notice
of, 10.

Frozen Lakes, Distribution of Tempera-
ture in, by John Aitken, 409.
Fungus Disease affecting Salmon and
other Fish, by A. B. Stirling, 232,
370.

Garefowl (Geierfugl), 679. See Auk
(Great).

Gaseous Particles, their Velocity at the
Negative Pole of a Vacuum Tube, by
Professor Tait, 430.

Gas Thermometer, 539.
Geddes (Professor), his Theory of the
"Iliad," 103.

Geddes (Patrick) on the Phenomena of
Variation and Cell-Multiplication in a
Species of Enteromorpha, 571.
Geikie (Professor Archibald), Carboni-
ferous Volcanic Rocks in the Basin of
the Firth of Forth, 65.

Notes on the Striæ and Boulders

of the Pentlands, 191.

on the Carboniferous Volcanic
Rocks of the Basin of the Firth of
Forth (second paper), 232.

on the Geology of the Rocky
Mountains, 426.

on Rock-Weathering, as illus-
trated in Edinburgh Churchyards,
518. See Rock-Weathering.

contributes Obituary Notice of
Professor James Nicol, 352.
Geikie (Dr James), The Geology of the
Faroe Islands, 495.

Geology of the Faroe Islands, by Dr
James Geikie, 495.
Geometry (Non-Euclidean), by Professor
Chrystal. See also Pangeometry.
of Elliptic Space, 653.
Gibson (Dr J.) on the Composition of
Reh, an Efflorescence on the Soil of
certain Districts in India, 277.

and Morrison (Dr R. M.) on
Peroxides of Zinc, Cadmium, Mag-
nesium, and Aluminium, 706.

Janssen (Jules) elected an Honorary
Fellow, 92.

Jenkin (Professor Fleeming) awarded the
Keith Prize for the Period 1877-79
for his Paper "On the Application
of Graphic Methods to the Determi-
nation of the Efficiency of Machinery,"
545, 637; Address by Professor
Balfour on presenting the Prize, 637.
Jerusalem, its Topography, by Lieut.
Claude Reignier Conder, R.E., 474.

Discoveries at, by Dr Robinson,
477; Colonel Warren, 477, 478.
Jolly (William) on the Transportation
of Rocks and carried Boulders of
Moray Firth, 178, 193, 620.

Keith Prize for Biennial Period 1875-
77, Presented to Professor Heddle,
62.
Kelland (Professor Philip) elected Pre-
sident of the Society, 1.

Delivers Introductory Address
for Session 1878-79, 2.

his Address on Presenting the
Keith Prize to Professor Heddle,
62.

Notice of his Death, and Eloge
of, by Sir Alexander Grant, 208.
The Society express their great regret
at the Death of their President,
211.

Obituary Notice of, 321.
Knots. On the Measurement of Be-
knottedness, by Professor Tait, 48.
Knott (Dr C. G.) and Professor Mac-
gregor on the Variation and Tem-
perature of the Electric Resistance
of certain Alloys, 714.

Researches on Contact Elec-

tricity, 362.

Lamont (Johann von), Obituary Notice
of, 358.

Laplace's Dynamical Theory of the
Tides, 92.

Laws of the Society.-Alteration of Law
XVII., and Addition to Law XV.,
408.

Lepidomelane, 64.

Leucoline Series, Part II., by G. Carr
Robinson and W. L. Goodwin, Part
II., 224, Part III., 256.

M.A., 56, 68. Mr Aitken's Obser-
vations on the subject, 409.
Listing (Jules Benedict) elected an
Honorary Fellow, 92.

Logical Algebra, Principles of, Part I.,
by Dr Alexander Macfarlane, Part I.,
44, Part II., 61, Part III., Applica-
tion to certain Problems in the Theory
of Probability, 105.

Loch-Lomond, Distribution of Tempera-
ture in, by J. Y. Buchanan, 69. Mr
Aitken's Observations on this subject,
414.

M'Bain (Dr James), Obituary Notice of,
350.
Macfarlane (Dr Alexander) on a Calcu-
lus of Relationship, 224.

Principles of Logical Algebra,
Part I., 44, Part II., 61, Part III.,
Application to certain Problems in
the Theory of Probability, 105.

on the Solution of the Simul-
taneous Equations ax + by = c, and
dx+ey=f, when the Symbols denote
Qualities, 283.

on Positive and Negative Elec-
tric Discharge between a Point and a
Plate, and between a Ball and a Plate,
555. Point and Plates, 557, 560;
Ball and Plate, 558, 561.

Suggestions on the Art of
Signalling, 698.

and Playfair (P. M.) on the Dis-
ruptive Discharge of Electricity, 50.

on the Discharge of Electricity
through Olive Oil, 727.
MacGillivray (Dr), his Description of
the "Big Boulder" in Barra, 177.
M'Gregor (Professor) and Knott (Dr C.
G.) on the Variation with Tempera-
ture of the Electric Resistance of
certain Alloys, 714.

Makdougall - Brisbane Prize for the
Period 1876-78, presented to Pro-
fessor Geikie, 272.
M'Kendrick (Professor J. G.) on the
Effects of Chloroform, Ethidene Dich-
loride, and Ether on Blood-Pressure,

100.

M'Laren (Charles), Notes on the Striæ
and Boulders on the Pentlands,

189.

William Akroyd, 37.

Links. If the Line divides Unsymmet-
rical Angles, the whole becomes a
Link, 49.

Linlithgow Loch, Distribution of Tem-
perature in, by J. Y. Buchanan,

Determined by the Wire Telephone,
707.

Maps. On the Colouring of Maps, by
Professor Tait, 501.

Note on the Colouring of Maps,
by Professor Frederick Guthrie, 727.