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Mr: J. M.Wilson's Remarks on an observation of Mr. Glaisher's 104

M. E. Wartmann on the Explosive Distance of the direct in.

duced Current between Electrodes of the same kind ..... 107

Mr. J. P. Cooke on the Construction of a Spectroscope with a

number of Prisms, by which the angle of minimum deviation

for any ray may be accurately measured and its position in

the solar spectrum determined

Mr. J. Gill on Regelation..

Dr. H. W. S. van der Kolk's Studies on Gases

Dr. Atkinson's Chemical Notices from Foreign Journals

Notices respecting New Books :-Archdeacon Pratt's Treatise

on Attractions, Laplace's Functions, and the Figure of the

Proceedings of the Royal Society :-

Dr.A.Matthiessen on the Expansion of Water and Mercury 149

Prof. W. H. Miller on the Forms of some Compounds of

Proceedings of the Geological Society :-

Mr. P. M. Duncan on the impressions of Selenite in the

Woolwich Beds and London Clay

The Rev. O. Fisher on the Relation of the Chillesford Beds

to the Norwich Crag

Mr. E. B. Tawney on the Western Limit of the Rhætic Beds

The Rev. P. B. Brodie on a Section of Lower Lias and

Rhætic Beds near Wells, Somerset

Dr. J. W. Dawson on the Conditions of the Deposition

Prof. W. King and Dr. T. H. Rowney on the Origin and

Microscopic Structure of the so-called Eozoon-Serpen-

Dr. W. B. Carpenter on the Structure and Affinities of

Eozoon Canadense

On the Measurement of Small Forces by means of the Pendulum,

by MM. Jamin and Briot....

On the Expansion of Saturated Vapours, by M. A. Cazin

NUMBER CCVIII.-MARCH.

Prof. How's Contributions to the Mineralogy of Nova Scotia.. 165

Mr. J. M. Wilson on some Problems in Chances....

Archdeacon Pratt on the Level of the Sea during the Glacial

Epoch in the Northern Hemisphere

Dr. E. J. Chapman on some Minerals from Lake Superior

Dr. H. W. S. van der Kolk's Studies on Gases

Prof. Tyndall on the Black-bulb Thermometer..

Captain A. R. Clarke on Archdeacon Pratt's 'Figure of the

Dr. Rankine on the Expansion of Saturated Vapours.

Dr. Rankine on Saturated Vapours....

Mr. D. D. Heath on Secular Local Changes in the Sea-level.. 201

Prof. Guthrie's Speculation concerning the relation between the

Axial Rotation of the Earth, and the Resistance, Elasticity,

and Weight of Solar Æther...

Prof. Sylvester on an improved form of Statement of the New

Rule for the Separation of the Roots of an Algebraical Equa-

tion, with a Postscript containing a New Theorem........ 214

Prof. Challis on the Solution of a Problem in the Calculus of

Variations by a New Method

Mr. J. Broughton on some Properties of Soap-bubbles

Proceedings of the Cambridge Philosophical Society :-

Dr. Drosier on the Functions of the Air-cells, and the Me-

chanism of Respiration, in Birds

Proceedings of the Royal Society :-

Mr. W. Huggins on the Spectrum of Comet 1, 1866 .... 233

Mr. B. Stewart on the Secular Change of Magnetic Dip,

as recorded at the Kew Observatory..

Proceedings of the Geological Society:-

Mr. R. A. C. Godwin-Austen on Belgian Geology...... 237

On the Changes which Stretching and the passage of a Voltaic

Current produce in a Magnetic Bar, by M. Villari of Naples. 239

On the Heat of Friction, by Prof. Josiah P. Cooke, Jun..................

Note regarding the decrease of Actinic Effect near the circum-

ference of the Sun, as shown by the Kew Pictures, by Messrs.

Warren De la Rue, Stewart, and Loewy..

NUMBER CCIX.-APRIL.

Dr. Stevelly on the Composition of Forces

Dr. Heddle on the occurrence of Wulfenite in Kirkcudbrightshire 253

M. E. Edlund on the Heat disengaged by Induction-currents,

and on the relation between this disengagement of Heat and

the mechanical force employed to produce it

Mr. J. M. Wilson on the Diminution of Direct Solar Heat in the

Upper Regions of the Atmosphere

Prof. Norton on Molecular Physics ..

Prof. J. A. Wanklyn on the Doctrine of Uniform and Constant

Saturation......

Prof. Sylvester on the Periodical Changes of Orbit, under certain

circumstances, of a particle acted on by a central force, and on

Vectorial Coordinates, &c., together with a new Theory of

the Analogues to the Cartesian Ovals in Space, being a

Sequel to "Astronomical Prolusions

Mr. J. Croll on the Physical Cause of the Submergence and

Emergence of the Land during the Glacial Epoch. With a

Note by Professor W. Thomson, F.R.S.....

Dr. Atkinson's Chemical Notices from Foreign Journals..

Proceedings of the Cambridge Philosophical Society :-

Prof. C. Babington on the Papyrus of the Lake of Gennesaret 315

Mr. H. Seeley on a New Theory of the Skull and of the

Proceedings of the Royal Society :-

Mr. B. Stewart on the Specific Gravity of Mercury.

Proceedings of the Geological Society:-

Mr. W. T. L. Travers on the mode of formation of certain

Lake-Basins in New Zealand......

Mr. R. Dawson on the occurrence of dead Littoral Shells

. in the bed of the German Ocean ..

Mr. T. F. Jamieson on the Glacial Phenomena of Caithness 318

On the Electrical Conductivity of Gases under feeble Pressures,

On St. Elmo's Fire, by Professor Frankland, F.R.S.

Historical Notice in reference to the retardation of the Earth's

Velocity of Rotation, by Professor Fick

On Sea-levels, by D. D. Heath, Esq.

On the Axial Rotation of the Earth, by J. S. Stuart Glennie,

M.A., F.R.A.S., &c. ....

On the relation between the Variation of Sun-spots and that of

the Amplitude of Magnetic Oscillation, by Father Secchi.. 324

NUMBER CCX.-MAY.

M. W. Siemens on the Question of the Unit of Electrical Re-

Mr. J. P. Cooke on the Aqueous Lines of the Solar Spectrum 337

Prof. Challis on the Motion of a small Sphere acted upon by

the Undulations of an Elastic Fluid ...

M. L. Schwendler on the Galvanometer Resistance to be em-

ployed in testing with Wheatstone's Diagram...

Prof. Young on the Completion of the Demonstration of New-

ton's Rule, and on a general property of derived Polynomials. 369

Mr. J. C. Moore on Glacial Submergence

Prof. Haughton on the Change of Eccentricity of the Earth's

Orbit regarded as a Cause of Change of Climate

Dr. Matthiessen on the Question of the Unit of Electrical Resistance 376

Prof. Sylvester's Supplemental Note on the Analogues in Space

to the Cartesian Övals in plano..

Prof. Tyndall on Calorescence

Proceedings of the Royal Society :-

Prof. W. H. Miller on the Forms of Graphitoidal Silicon

and Graphitoidal Boron

Proceedings of the Geological Society :-

Mr. R. J. L. Guppy on the Tertiary Mollusca of Jamaica. 399

Mr. R. J. L. Guppy on Tertiary Echinoderms from the

West Indies, and on Tertiary Brachiopoda from Trinidad 400

Dr. Young on the affinities of Platysomus, and on the

On a Gas-burner for Sounding large Tubes, by E. Reusch... 401

Note on the Mechanical Equivalent of Light, by Moses G. Farmer 403

On the Composition of Forces, by Dr. Stevelly

NUMBER CCXI.-JUNE.

Mr. W. Huggins and Dr. W. A. Miller on the Spectra of some

of the Fixed Stars. (With Two Plates.)

Mr. I. Todhunter on a Problem in the Calculus of Variations.. 425

Dr. A. Paalzow on the Heat of the Electric Spark.

Archdeacon Pratt on the Fluid Theory of the Earth

Prof. Tyndall on Calorescence. (With a Plate)

Dr. Atkinson's Chemical Notices from Foreign Journals

Prof. Challis on the Fundamental Ideas of Matter and Force

in Theoretical Physics

Proceedings of the Royal Society :-

Mr. W. Huggins on the Spectra of some of the Nebula,

with a mode of determining the Brightness of these

Dr. Everett's Experiments on the Flexural and Torsional

Rigidity of a Glass Rod, leading to the determination of

the Rigidity of Glass....

Proceedings of the Geological Society :-

Messrs. St. Vincent Lloyd, Delenda, and Décigala on the

formation of a new island in the neighbourhood of the

Mr. J. B. Jukes on the Carboniferous Slate of North Devon

and South Ireland....

Mr. W. B. Dawkins on the Fossil British Oxen

Commander G. Tryon on the formation of a new island

in the neighbourhood of the Kameni Islands

Mr. T. McKenny Hughes on the Junction of the Thanet

Mr. W. Whitaker on the Lower London Tertiaries of Kent 480

Mr. W. Keene on the Brown Cannel Coal-seams at Colley

The Rev. W. B. Clarke on the Oil-bearing Deposits in New

South Wales ....

M. H. Bauerman on the Copper-mines of Michigan ... 482

On the Influence of the Electro-negative Elements upon the

Spectra of the Metals, by M. Diacon

On the Determination of the Refractive Equivalent of the Ele-

ments, by M. A. Schrauf ...

NUMBER CCXII.-SUPPLEMENT.

Drs. A. Fick and J.Wislicenus on the Origin of Muscular Power. 485

Mr. B. Stewart on the Solar Spectrum

Prof. J. A. Wanklyn on the Action of Carbonic Oxide on

Sodium-ethyle..

M. G. Neumayer on Aqueous Vapour and Terrestrial Radiation. 510
Mr. W. Huggins and Dr. W. A. Miller on the Spectra of some
of the Fixed Stars...

Mr. W. Huggins on the Spectra of some of the Nebulæ

Archdeacon Pratt on the Level of the Sea during the Glacial

Prof. W. Thomson on the Observations and Calculations re-

quired to find the Tidal Retardation of the Earth's Rotation 533

Proceedings of the Royal Society:-

Mr. J. Evans on a possible Geological Cause of Changes

in the Position of the Axis of the Earth's Crust...... 537

Proceedings of the Geological Society :-

M. Fouqué on the Eruptions at the Kaimeni Islands .... 545

Mr. A. Tylor on the Upper and Lower Valley-gravels of

part of England and France

Sir Philip de M. Grey Egerton on a new species of Acan-
thodes from the Coal-shales of Longton ...

Mr. H. Seeley on the Gravels and Drift of the Fenland .. 547

Prof. Harkness and Mr. H. Nicholson on the Geology of

the Lake-country, and on the Lower Silurian Rocks of

the Isle of Man

....

On the Law of the Union of Simple Substances, and on Attrac-

tions at Small Distances, by MM. Athanase and P. Dupré.. 548

On a New Method of Measuring the Lengths of Luminous

Waves, by Professor Stefan ...

On the Influence of Internal Friction in the Air on the Motion

of Sound, by Professor Stefan....

I. II. III. Illustrative of Sir David Brewster's Paper on the Bands formed
by the Superposition of Paragenic Spectra produced by the
Grooved Surfaces of Glass and Steel.

IV. Illustrative of Prof. Tyndall's Paper on Calorescence.

V. VI. Illustrative of Mr. W. Huggins and Dr. Miller's Paper on the
Spectra of some of the Fixed Stars, and Mr. W. Huggins's on the
Spectra of some of the Nebula.

ERRATA.

Vol. 30. Page 410, lines 30 and 31, transpose the words "common oxygen

439, line 12, for (2509) 2500) 80

- 305, line 2 from bottom, for simple proportion to the latitude

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