Proceedings

Note on Circular Crystals. By E. W. Dallas,

Preliminary Note on the Flame produced by putting Common Salt

into a Fire. By C. M. Smith. Communicated by Professor

The Annual Periods of Thunder (with Lightning), Lightning (only),
Hail, and Snow, at Oxford. By Alexander Buchan, M.A.,

Note on the Origin of Thunderstorms. By Professor Tait, .

An Application of Professor James Thomson's Integrator to harmonic

Analyses of Meteorological, Tidal, and other Phenomena, and to

the Integration of Differential Equations. By Sir W. Thomson, 138

Note on the Thermo-Electric Position of Cobalt. By Professor Tait, 138

On a Glass Digester in which to Heat Substances under Pressure.

By Dr E. A. Letts,

On the Connection between Cohesion, Elasticity, Dilatation, and

Temperature. By Professor George Forbes,

Notice of the Completion of the Works designed by Sir Charles A.

Hartley, F.R.S.E., for the Improvement of the Danube. By

David Stevenson, V.P.R.S.E.,

Chapters on the Mineralogy of Scotland.

By Professor Heddle.

Chapter I.-On the Rhombohedral Carbonates. Communicated

by Professor Tait,

On Thermo-Dynamic Motivity. By Sir W. Thomson,

On the Vortex Theory of Gases, of the Condensation of Gases on

Solids, and of the Continuity between the Gaseous and Liquid

State of Matter. By Sir W. Thomson,

On two new Laboratory Apparatus. By William Dittmar, .

On an Improved Form of Galvanic Battery. By J. Cook. Com-

municated by Professor Tait,

On the Properties of the Perigon Versor. By G. J. P. Grieve.

Communicated by Professor Kelland,

Descriptions of some new or imperfectly understood Forms of

Paleozoic Corals. By H. Alleyne Nicholson, M.D., D.Sc.,

F.R.S.E., Professor of Natural History in the University of St

Andrews, and James Thomson, F.G.S.,

On a Stable and Flexible Arch. By Professor Fleeming Jenkin,

Is the Gaelic Ossian a Translation from the English? By Professor

Blackie,

Notes on Dredging in Madeira. By the Rev. Robert Boog Watson,

B.A., F.R.S.E., F.G.S.,

Note on a New Fossil Foot-Print from the Permian Sandstone of

Dumfriesshire. By Patrick Dudgeon, F.R.S.E. (Plate I.),

On the Decennial Period in the Mean Amplitude of the Diurnal

Oscillation and Disturbance of the Magnetic Needle and of the

Sun-spot Area. By J. A. Broun, F.R.S.,

PAGE

154

. 155

On the Parallel Roads of Lochaber. By David Milne Home, LL.D., 159.

Physical Observations in Northern Asia. By Professor G. Forbes,. 161

On Parallel Motions. By the Rev. John Wilson, M.A., Bannock-

burn Academy. Communicated by Professor Kelland,

Laboratory Notes. By Professor Tait-

161

170

a. On the Passage of the Electric Current from Amalgamated

Zinc Sulphate Solution. By J. G. MacGregor, M.A.,

b. On the Thermo-Electric Properties of Cobalt, &c. By

Messrs Knott, MacGregor, and C. M. Smith,

c. Measurements of the Potentials required for Long Sparks

of a Holtz Machine. By Messrs Macfarlane and Paton, 170

170

Note on Orthogonal Isothermal Surfaces. By Professor Tait,

Notice of some Recent Atmospheric Phenomena. By Professor Tait, 170

Report by the Society's Boulder Committee. (Plates II. and III.), 170

Election of Office-Bearers,

Com-

Opening Address by the Rev. W. Lindsay Alexander, D.D., .
On the Roots of the Equation V pop = 0. By Gustav Plarr.
municated by Professor Tait,

Applications of the Theorem that Two Closed Plane Curves intersect

an even number of times. By Professor Tait,

On the Distribution of Volcanic Debris over the Floor of the Ocean,

-its Character, Source, and some of the Products of its Disintegra-

tion and Decomposition. By John Murray, Esq. Communicated

by Sir C. Wyville Thomson,

On New and Little-known Fossil Fishes from the Edinburgh Dis-

trict. No. I. By R. H. Traquair, M.D., F.G.S., .

On the Ruff (Machetes Pugnax). By Professor Duns,

Communication from the President relative to the Administration

of the Government Fund of £4000,

. 203

. 204

237

247

On New and Little-known Fossil Fishes from the Edinburgh Dis-
trict. No. II. By R. H. Traquair, M.D., F.G.S.,

Note on Clapeyron's Formula. By Professor Dewar,

Note on the Specific Gravity of Ocean Water. By J. Y. Buchanan, 283

Note on the Manganese Nodules found on the bed of the Ocean.

Note on the Measure of Beknottedness. By Professor Tait, .

Note on the Effect of Heat on Infusible Impalpable Powders. By

Professor Tait,

289

298

Abstract of Additional Memoir on the Parallel Roads of Lochaber.

By D. Milne Home, LL.D.,

. 299

PAGR

On Some Effects of Heat on Electro-Static Attraction. By Prof. Tait, 302

On the Curves produced by Reflection from a Polished Revolving

Wire. By Edward Sang, Esq.,

302

On an Ammonia-Cupric Zinc Chloride. By E. W. Prevost, Ph.D., . 302

On a Peculiarity of the Diurnal Hygrometric Curve at Geneva. By

Alexander Buchan, Esq.,

On Knots. By Professor Tait,

Presentation of the Makdougall-Brisbane Prize to Alexander Buchan,

M.A.,

304

306

319, 486

On the Action of Sulphuretted Hydrogen on the Hydrate and on the

Carbonate of Trimethyl-Sulphine. By Professor Crum Brown, 319

On Links. By Professor Tait,

Laboratory Notes. By Professor Tait-

. 321

a. Measurement of the Potential required to produce Sparks

of various lengths, in Air at different pressures, by a

Holtz Machine. By Messrs Macfarlane and Paton,

b. The Thermal Conductivity of Gas Coke. By Messrs Knott

and Macfarlane,

c. Preliminary Experiments on the Currents produced by

contact of Wires of the same metal at different Tempera-

tures. By Messrs Knott and Macfarlane,

d. On the Relative Percentages of the Atmosphere and of the

Ocean which would flow into a given Rent in the Earth's

Surface. By Professor Tait,

On the Biliary Secretion with reference to the Action of Cholagogues.

By Professor Rutherford, F.R.SS. L. and E., and M. Vignal,

Specimen of Auriferous Quartz. By Patrick Dudgeon,

On a Problem of Arrangements. By Professor Cayley,

On the Construction of the Canon of Sines, for the Decimal Division

of the Quadrant. Edward Sang, Esq.,

On the Precautions to be taken in recording and using the Records

of Original Computations. Edward Sang, Esq.,

On an Unnamed Palæozoic Annelid. By Prof. Duns. (Plate IV.),

On Eisenstein's Continued Fraction. By Thomas Muir, M.A.,

Note on an Infinitude of Operations. By Thomas Muir, M.A.,

Note on Determinant Expressions for the Sum of a Harmonical

Progression. By Thomas Muir, M.A.,

Sevenfold Knottiness. By Professor Tait,
Exhibition of a Large Map showing the Progress of the Geological
Survey of Scotland. By Professor Geikie,

Notice of a Saline Water from the Volcanic Rocks of Linlithgow.

By Professor Geikie, F.R.S.,

On the Arrangement and Relations of the Great Nerve-Cords in the

Marine Annelids. By W. C. M'Intosh, M.D., F.R.S.E., F.L.S., . 372

On the Application of Graphic Methods to the Determination of the

Efficiency of Machinery. By Professor Fleeming Jenkin,

On Professor Tait's Problem of Arrangement.

On Mr Muir's Discussion of Professor Tait's Problem of Arrange-
ments. By Professor Cayley,

On Amphicheiral Forms and their Relations. By Professor Tait, 391

On the Toothing of Un-round Discs which are intended to roll upon

each other. By Edward Sang,

393

On the Mineralogy of Scotland. Chapter II. By Professor Heddle, 393

Least Roots of Equations. By J. D. Hamilton Dickson,

On New and Little-known Fossil Fishes from the Edinburgh Dis-
trict. No. III. By Dr R. H. Traquair. (See Appendix),

On Ocean Circulation. By John Aitken,

On a New Investigation of the Series for the Sine and Cosine of an

Arc. By Edward Sang,

Note on the Bifilar Magnetometer. By J. A. Broun, F.R.S. Com-

municated by Professor Tait,

Addition to the paper "On the Establishment of the Elementary

Principles of Quaternions." By G. Plarr.

XXVII. of the Transactions of the Society.

Note on Mr Muir's Solution of a "Problem of Arrangement." By

Professor Cayley,

Preliminary Note on a New Method of Investigating the Properties

of Knots. By Professor Tait,

On the Cranial Osteology of Rhizodopsis, and on some points in the

Structure of Rhizodus. By Dr R. H. Traquair. (See Appendix), 403

Notice of Recent Earthquake Shocks in Argyleshire in 1877. By

David Stevenson, Civil Engineer,

Additional Remarks on Knots. By Professor Tait,

On the Structure and Relations of the Genus Holopus. By Sir C.

Wyville Thomson, F.R.S.,

On the Diurnal Oscillations of the Barometer. Part II. By

Alexander Buchan, M.A.,

On the Air Dissolved in Sea-Water. By J. Y. Buchanan,

Why the Barometer does not always indicate real Vertical Pressure:

A continuation of the Paper laid before the Royal Society of

Edinburgh in July 1875, in which, in addition to several other

points, this was attempted to be shown. It is now more fully

written out. By Robert Tennent, .

Laboratory Notes. By Professor Tait-

410

412

a. On an Effect of Heat on Electro-Static Action,

415

b. On Dr Blair's Scientific Aphorisms in connection with the

Ultra-Mundane Particles of Le Sage,

415

PAGE

Note on an Identity. By Professor Tait,

APPENDIX :-

The Thermo-Electric Properties of Cobalt. By Messrs C. G.

Knott, J. Gordon MacGregor, and C. Michie Smith, .

Notice of some Recent Atmospheric Phenomena. By Professor

Tait,

On New and Little-known Fossil Fishes from the Edinburgh

District. No. III. By R. H. Traquair, M.D., F.G.S.,

On the Cranial Osteology of Rhizodopsis, and on some points in

the Structure of Rhizodus. By Dr R. H. Traquair,

Election of Office-Bearers,

Opening Address by the Vice-President, Principal Sir Alexander

Grant, Bart.,

Remarks by Sir William Thomson on delivering the Makdougall-

Brisbane Prize to Mr Buchan,

Report of the Deputation to Upsala. By Alexander Buchan, M.A., 521

On a Method of Determining the Cohesion of Liquids. By J. B.

Hannay, F.C.S.,

. 526

Note on Vector Conditions of Integrability. By Professor Tait, . 527

On Gladstone's Theory of Colour-Sense in Homer. By Professor

Blackie,

Note on a Geometrical Theorem. By Professor Tait,

On the Tabulation of all Fractions whose values are between two

prescribed limits.

By Edward Sang,

Can the Law of Multiple Proportions be demonstrated from

Analytical Data? By W. Dittmar,

On the Solid Fatty Acids of Coco-Nut Oil. By G. Carr Robinson,. 537

Suspension, Solution, and Chemical Combinations. By William

Durham,

Note on the Surface of a Body in terms of its Mass. By Professor

Tait,

On a White Sunbow. By Sir Robert Christison, Bart., Professor

Tait, Mr J. Christison, Mr Buchan, and Dr Ferguson,

Letter on the Phonograph. By H. E. Rosevelt,

Address by Sir Wyville Thomson on delivering the Neill Prize to

Dr Traquair,

Chapters on the Mineralogy of Scotland. Chapter III.—The Garnets.

By Professor Heddle,

On the Strength of the Currents required to work a Telephone.

Professor Tait,

Experiments with the Telephone. By James Blyth. Communicated

by Professor Tait,

On the Theory of the Telephone. By Professor George Forbes, 555

Some Experiments with the Telephone. By John G. M'Ken-

drick, M.D.,

. 558

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Proceedings, Volume 9