Christison (Sir Robert), Note on a
White Sunbow, 542.
Circles, Properties of two sets of three
Concentric Circles, intersecting one
another, by Professor Tait, 533.
Clapeyron's Formula, Note on, by Pro-
fessor Dewar, 283.

Closed Plane Curves. See Curves.
Cobalt, Note on the Thermo-Electric
Position of, by Professor Tait, 138.

Note on the Thermo-Electric
Properties of, by Messrs Knott,
MacGregor, and C. M. Smith, 170.
Cocoa-Nut Oil, On the Solid Fatty
Acids of, by G. Carr Robinson, 537.
Cohesion. On the connection between
Cohesion, Elasticity, Dilatation,
and Temperature, by Professor
George Forbes, 141.

526.

of Liquids, by J. B. Hannay,

Colour.- Method of Studying the
Binocular Vision of Colour, by
Professor M'Kendrick, 654.

in Practical Astronomy, by
Professor Piazzi Smyth, 721.
Columnar Vortices, Vibrations of a
Triad of, by Sir William Thomson,
660.

Combinations (Chemical), 537.
Conductivity of Stretched Silver
Wires, by J. G. MacGregor, M.A., 79.
Coniferæ, On the Defoliation of the,
by Dr Stark, 85.

Constant (Cyclic) of a Vortex, p. 70.
Continued Fractions, Transformation

of Infinite Series into, by Thomas
Muir, M.A., 117.

Cook (J.) on an Improved Form of
Galvanic Battery, 148.

Corals, On New Forms of Paleozoic,

by Professor Alleyne Nicholson
and James Thomson, 149.
Core, or Vortex Core, by Sir W.
Thomson, 69.
Coventry (Andrew), Obituary Notice
of, by Sir Alex. Grant, 506.
Crawford (Dr Thomas Jackson), Obit-
uary Notice of, 17.
Crystals, Note on Circular, by E. W.
Dallas, 129.

Curves. Applications of Theorem
that Two Closed Plane Curves
intersect an even number of times,
by Professor Tait, 237.

On the Curves produced by Re-
flection from a Polished Revolving
Wire, by Edward Sang, 302.

Curves. Tables of Ballistic Curves
applied to Gunnery, by E. Sang, 637.

On a Peculiarity of the Diur-
nal Hygrometric Curves at Geneva,
by Alexander Buchan, 304.
Cyclic Constant of a Vortex, 69.

Dallas (E. W.), Note on Circular
Crystals, 129.

Danube, Works for the Improvement
of the, designed by Sir Charles A.
Hartley, by David Stevenson, 142.
De Candolle (Alphonse) elected an
Honorary Fellow, 287.

De la Rive (M.) on Sounds emitted
by Induction Coils, 627, 628.
Determinants.-On Determinant Ex-
pressions for the Sum of a Harmoni-
cal Progression, by T. Muir, 361.

On a Class of Determinants,
by J. D. H. Dickson, 714.
Dewar (Professor) on Clapeyron's
Formula, 283.

Diamagnetic Rotation, by Prof.
George Forbes, M.A., 85.
Dickson (J. D. Hamilton) on the
Least Roots of Equations, 393.

-on a Class of Determinants, 714.
Differential Equation of Second Order.
See Equation.

Digester.-On a Glass Digester in

which to heat Substances under
Pressure, by Dr E. A. Letts, 139.
Dilatation.-On the Connection be-
tween Cohesion, Elasticity, Dilata-
tion, and Temperature, by Professor
George Forbes, 141.

Disruptive Discharge of Electricity,
by Alex. Macfarlane, M.A., and P.
M. Playfair, M.A., 563, 721.
Dittmar (William) on New Forms of
Precision Balance and Gas governor,
145.

Can the Law of Multiple
Proportions be demonstrated from
Analytical Data? 536.
Diurnal Oscillations of the Barometer,
Part II., by Alex. Buchan, M.A.,
410.

Donations to the Library, 739-765.
Dove (Heinrich Wilh.) elected an
Honorary Fellow, 43.

Drummond (Rev. David Thomas Ker),
Obituary Notice of, by Professor
Balfour, 518.

Drummond (George Stirling Home),
Obituary Notice of, by Dr W. L.
Alexander, 218.

Dudgeon (Patrick) on a New Fossil
Foot-print from Permian Sandstone,
154.

exhibits Specimen of Auri-

ferous Quartz, 333.
Dundas (Sir David), Obituary Notice
of, by Sir Alex. Grant, 508.
Duns (Professor) on the Ruff (Machetes
pugnax), 272.

on an Unnamed Palæozoic
Annelid, 352.
Durham (William) on Suspension,
Solution, and Chemical Combina-
tions, 537.

Earthquake Shocks in Argyleshire in
1877, by D. Stevenson, 403.
Ehrenberg (Christian Gottfried), Obit-
uary Notice of, 230.
Eisenstein's Continued Fraction, by
Thomas Muir, 359.

Elasticity. On the Connection be-
tween Cohesion, Elasticity, Dilata-
tion, and Temperature, by Prof.
George Forbes, 141.
Electric Conductivity of Bars, by
Prof. Tait, 718.

of Nickel, by C. Michie Smith
and J. Gordon MacGregor,

of Stretched Silver Wires, by
J. G. MacGregor, M.A., 79.
Electric Current, On the Passage of
the, from Amalgamated Zinc Sul-
phate Solution, by J.G. MacGregor,
170.
Electric Currents produced by Con-
tact of Wires, 333.

On the Splitting up of Electric
Currents, as detected by the Tele-
phone, 707.

Electricity, Disruptive Discharge of,
563.

Electrolytic Conduction, by Prof.
Tait, 614.

Electrostatic Attraction, On Some
Effects of Heat on, by Professor
Tait, 302.
Equations, Linear Differential, of
Second Order, by Professor Tait,
93, 118.
Equation V pop=0, by Gustav Plarr,
237.

Least Roots of, by J. D.
Hamilton Dickson, 393
Ethylene, Action of Chlorides of
Iodine upon, 588.

Ewing (Mr J. A.), Remarks on the
Phonograph, 579.

Ewing (Mr J. A.) on the Wave
Forms of Articulate Sounds, 582
714.
on the Wave Sounds pro-
duced by the Apparatus exhibited
by Professor Crum Brown, 723.

Faraday (Professor), Rotation of Plane
of Polarization of Light, 85, 118
Ferguson (Dr R. M.), Note on a White
Sunbow, 548.

on Indications of Molecular
Action in the Telephone, 615.
Fire-Damp, On a Method of Detecting,
613.

Fishes, New and Little-Known Fossil,

from the Edinburgh District, by Dr
R. H. Traquair, No. 1, 262; No. 2,
275; No. 3, 394, 427.
Footprint, On a New Fossil, from
Permian Sandstone, by Patrick
Dudgeon, 154.

Forbes (Professor George) on Diag-
magnetic Rotation, 85.

on the Connection between
Cohesion, Elasticity, Dilatation, and
Temperature, 141.

Physical Observations in
Northern Asia, 161.

on the Theory of the Tele-
phone, 555.

Preliminary Note on a Method
of Detecting Fire-Damp in Coal
Mines, 613.

Fossil Fishes. See Fishes.
Fractions.-Transformation of Infinite
Series into Continued Fractions, by
Thomas Muir, M.A., 117.

Tabulation of all Fractions
whose Values are between two pre-
scribed limits, by E. Sang, 536.
French Horn, Mouthpiece for Produc-
ing Chords from, 536.

Fungus Disease affecting Salmon, by
A. B. Stirling, 726.

Galvanic Battery, On an Improved
Form of, by J. Cook, 148.
Garnets, by Professor Heddle, 550.
Gas-Coke, Thermal Conductivity of,
333.

Gases, Vortex Theory of, Condensa-
tion of Gases on Solids, and Con-
tinuity between the Gaseous and
Liquid State of Matter, by Sir
William Thomson, 144.

Gas-governor, On a New Form of, by
William Dittmar, 147.

Gegenbaur (Professor Carl) elected an
Honorary Fellow, 287.
Geikie (Professor) exhibits Map show-
ing Progress of Geological Survey
of Scotland, 367.

on Saline Water from Vol-
canic Rocks of Linlithgow, 367.
Geological Survey of Scotland, 367.
Gibson (Dr J.) on a New Method for
the Separation of Yttrium and Er-
bium from Cerium, Lanthanum, and
Didymium, 734.

Gladstone (Mr), Remarks by, 40.

his Theory of Colour-Sense in
Homer, 533.

Glass Digester. See Digester.
Glass, Refractive Index of, 567.
Gordon (James) writes Latin Ad-

dress Presented by the Society's
Deputation to the University of
Upsala, 521, 526.

Gordon (Lewis D. B.), Obituary
Notice of, 212.

Gott (M.) converts two Siphon Re-
corders into a Telegraphic System,
570.

Government Fund of £4000, 275.
Grant (Sir Alexander), V.P., contri-
butes Opening Address for Session
1877-78, 472.

contributes Obituary Notice
of the Hon. Lord Neaves, 503.

contributes Obituary Notice
of Andrew Coventry, Advocate, 506.
contributes Obituary Notice
of Sir David Dundas, Bart., 508.
Graphic Methods of Determining the
Efficiency of Machinery, by Prof.
F. Jenkin, 381, 563.

Graphic Method applied to the De-
termination of the Efficiency of a
Direct-acting Steam Engine, by
Professor Fleeming Jenkin, 563.
Graphitoid, The Preparation and Pro-
perties of, by R. M. Morrison, 721.
Grieve (G. J. P.) on the Properties of
the Perigon Versor, 149.
Guthrie (Colonel Seton), Notice of
Death of, 4.

Hail and Snow at Oxford, by Alex.
Buchan, M.A., 135.
Hannay (J. B.) on a Method of De-
termining the Cohesion of Liquids,
526.

Handyside (Dr P. D.) on the Ana-
tomy of a Recent Species of Polyo-
don, the Polyodon gladius (Martens),
660.

VOL. IX.

Harvey (Sir George), Obituary Notice
of, 205.

Hawaiian Islands, Volcanoes of, by J.
W. Nichol, 113.

Heat. On the Effect of Heat on In-
fusible Palpable Powders, by Pro-
fessor Tait, 298.

On some Effects of Heat on
Electrostatic Attraction, by Profes-
sor Tait, 302.

On an Effect of Heat in Elec-
trostatic Action, by Prof. Tait, 415.
On the Action of Heat on Some
Salts of Trimethyl-Sulphine, by
Professor Crum Brown and J.
Adrian Blaikie, 565, 712.

Heddle (Professor), The Mineralogy
of Scotland, Chap. I., Rhombohedral
Carbonates, 144; Chap. II., Ortho-
clase, Albite, &c., 393; Chap. III.,
The Garnets, 550; Chap. IV.,
Augite, Hornblende, and Serpen-
tinous Change, 595.

Helmholtz (H.), His Simple Circular
Ring, 68.

Holopus, The Structure and Relations
of the genus Holopus, by Sir C.
Wyville Thomson, 405.

Home (David Milne) delivers Opening
Address for Session 1875-76, 2.

on the Parallel Roads of
Lochaber, 159.

Third Report of the Society's
Boulder Committee, 170.

Fourth Report of Boulder
Committee, 660.

Remarks by, on Presenting
the Boulder Committee's Fourth
Report, 692.

Homer, Colour-Sense in, 533.
Horn. See French Horn.
Hornblende, by Professor Heddle, 595.

Iceland, Volcanic Eruptions of, in
1874 and 1875, by Captain Burton,
44.

Identity.-Note on an Identity, by
Prof. Tait, 416.

Infinitude of Operations, by T. Muir,

359.

Infusible Palpable Powders. See
Powders.

51

Kekule (August) elected an Honorary
Fellow, 43

Kidney, On some Physical Experi-
ments relating to the Function of
the, by David Newman, Glasgow,648.
Knots. Theorem of Intersection of
Two Plane Curves, by Prof. Tait, 237.

On the Measure of Beknot-
tedness, by Professor Tait, 289.

On Links, by Prof. Tait, 321.
Professor Tait's Problem of
Arrangement, 382.

On Amphicheiral Forms and
their Relations, by Prof. Tait, 391.

On a New Method of Investi-
gating the Properties of, 403.

Additional Remarks on, 405.

Knott (C. G.) on the Thermo-Electric
Properties of Cobalt, &c., 170, 421.
on the Thermo-Electric Pro-
perties of Charcoal, 579.

on Thermal Conductivity of
Gas Coke, 333.

on Currents produced by Con-
tact of Wires, 333.

Kolbe (Herman) elected an Honorary
Fellow, 43.

Kummer (Ernst Eduard) elected an
Honorary Fellow, 43.

Laboratory Notes, by Professor Tait,

118.

Language, On the Origin of, by Pro-
fessor Blackie, 98.

Latin Address presented by the So-
ciety's Deputation to the Univer-
sity of Upsala, 526.
Laycock (Professor Thomas), Obit-
uary Notice of, 223.
Leopold (Prince), Remarks by, 30.
Le Sage, Ultra-Mundane Particles of,
415.

Letts (Dr E. A.) on a Glass Digester
in which to heat Substances under
Pressure, 139.

Leucoline Series, New Bases of, by
G. Carr Robinson, 732.
Le Verrier (Urbain Jean Joseph),
Obituary Notice of, 489.
Lightning, Hail, and Snow at Oxford,
by Alex. Buchan, M.A., 135.
Lindsay (Dr Lauder) on the Auri-

ferous Quartz of Wanlockhead, 579.
Linear Differential Equation of
Second Order, by Professor Tait,
93, 118.

Links, by Professor Tait, 321.
Linlithgow, Saline Water from Vol-
canic Rocks of, 367.
Liouville (Joseph) elected an Honorary
Fellow, 43.
Liquid.-On Two-Dimensional Ap-
proximately Circular Motion of a
Liquid, by Sir William Thomson,
98.
Liquids, Method of Determining the
Cohesion of, by J. B. Hannay, 526.
Lochaber, On the Parallel Roads of,
by David Milne Home, LL.D., 159.
Logan (Sir William Edmund), Obitu-
ary Notice of, 9.

Login (Thomas), Obituary Notice of,

205.

Lyell (Sir Charles), Obituary Notice
of, 6.

Macdonald (Professor William), Obit-
uary Notice of, 22.
Macfarlane (Alex.), Potentials required
for Sparks of a Holtz Machine, 170,
332.

on Thermal Conductivity of
Gas-Coke, 333.

on Currents produced by Con-
tact of Wires, 333.

on the Disruptive Discharge
of Electricity, 563. 721.

on the Discharge of Electricity
through Turpentine, 579.
M'Gowan (George), Action of Chlo-
rides of Iodine upon Acetylene and
Ethylene, 588.

MacGregor (J. Gordon) on the Electric
Conductivity of Nickel, 120.

on the Thermo-Electric Pro-
perties of Cobalt, &c., 170, 421.

on the Passage of the Electric
Current from Amalgamated Zinc
Sulphate Solution, 170.

on the Thermo-Electric Pro-
perties of Charcoal, 579.
Machetes pugnax, by Professor Duns,

272.

Machinery, Graphic Methods of Deter-
mination of Efficiency of, by Prof.
F. Jenkin, 381.

M'Intosh (Dr W. C.) on the Structure
of the Body-Wall in the Spionidæ,
123.

on Arrangement of Great
Nerve Cords in the Marine Anne-
lids, 372.
M'Kendrick (Professor), Some Experi-
ments with the Telephone, 558.

On a Method of Studying the
Binocular Vision of Colour, 654.
Mackenzie (Donald, Lord), Obituary
Notice of, 23.

Madeira, On Dredging in, by Rev. R.
B. Watson, 153.

Madvig (Professor J. N.) elected an
Honorary Fellow, 536.'
Magnetic Needle, On Decennial

Period in Oscillation and Disturb.
ance of, by J. A. Broun, 155.
Magnetism.-On a Possible Influence
of Magnetism on the Absorption of
Light, by Professor Tait, 118.
Magnetometer (Bifilar), 402.
Makdougall-Brisbane Prize presented
to Alex. Buchan, M.A., 319.
Marsden (R. Sydney) on Pure
Graphitoid and Adamantine Boron,
721.

Masson (Prof.) contributes Obituary
Notice of John Lothrop Motley, 508.
Max Müller (Professor) on Origin of
Language, 98.
Microphone. An account of some Ex-
periments on the Telephone and
Microphone, by James Blyth, M.A.,
711.

Note on a Variation of the, by
R. M. Morrison, D.Sc., 712.
Mineralogy of Scotland, by Professor
Heddle-Chap. I., Rhombohedral
Carbonates, 144; Chap. II., Ortho-
clase, Oligoclase, &c., 393; Chap.
III., the Garnets, 550; Chap. IV.,
Augite, Hornblende, and Serpen-
tinous Change, 595.

Molecular Action in the Telephone,
by Dr R. M. Ferguson, 615.
Monamines.-On a new General
Method of Preparing the Primary
Monamines, by R. Milner Morrison,
D.Sc., 721.

Monodon Monoceros, On the Placen-
tation of, by Professor Turner, 103.
Morrison (Dr R. M.), Note on a Vari-
ation of the Microphone, 712.

on a new General Method of
Preparing the Primary Monamines,
721.

on Pure Graphitoid and Ada-
mantine Boron, 721.
Motion.-Extended

66

definition of

Steady" Motion, 59.

On Two-Dimensional Approxi-
mately Circular Motion of a Liquid,
by Sir William Thomson, 98.
Motions, On Parallel, by Rev. John
Wilson, M.A., 161.

Motivity, On Thermo-Dynamic, by Sir
William Thomson, 144.

Motley (John Lothrop) elected an
Honorary Fellow, 43.

Obituary Notice of, by Profes-
sor Masson, 508.

Muir (Thomas), Transformation of
Infinite Series into Continued
Fractions, 117.

on Eisenstein's Continued
Fraction, 359.

on an Infinitude of Opera-
tions, 359.

on Determinant Expressions
for Sum of a Harmonical Progres-
sion, 361.

-on Professor Tait's Problem
of Arrangement, 382, 402.
Multiple Proportions, 536.