Report of the Annual Meeting

Mr. F. W. NEWMAN on Doubly Diametral Quartan Curves...

Professor PURSER's Remarks on Napier's original Method of Logarithms.... 23

Mr. W. H. L. RUSSELL on Linear Differential Equations..

on MacCullagh's Theorem.

Mr. J. J. SYLVESTER on the Theory of a Point in Partitions..

Sir W. THOMSON on the General Canonical Form of a Spherical Harmonic of

the nth Order :.

GENERAL PHYSICS.

Mr. ROBERT STAWELL BALL'S Account of Experiments upon the Resistance

of Air to the Motion of Vortex-rings

Mr. H. DEACON's Experiments on Vortex-rings in Liquids

Professor J. D. EVERETT on Units of Force and Energy...

Dr. J. H. GLADSTONE and ALFRED TRIBE on the Corrosion of Copper Plates

by Nitrate of Silver

...

M. JANSSEN'S Remarks on Physics

Mr. T. M. LINDSAY and W. R. SMITH on Democritus and Lucretius, a Ques-

tion of Priority in the Kinetical Theory of Matter....

Professor JAMES THOMSON'S Speculations on the Continuity of the Fluid State

of Matter, and on Relations between the Gaseous, the Liquid, and the Solid

States

Observations on Water in Frost Rising against

Gravity rather than Freezing in the Pores of Moist Earth

ASTRONOMY.

Professor CLIFFORD on the Secular Cooling and the Figure of the Earth ....

Dr. GILL'S Observations on the Parallax of a Planetary Nebula

M. JANSSEN on the Coming Solar Eclipse

....

Mr. J. NORMAN LOCKYER on the Recent and Coming Solar Eclipses.

Mr. R. A. PROCTOR On the Construction of the Heavens.

Professor OSBORNE REYNOLDS on Artificial Coronas...

Mr. H. FOX TALBOT on a Method of Estimating the Distances of some of the

Fixed Stars

Professor CHARLES V. ZENGER on the Nutoscope, an Apparatus for showing

Graphically the Curve of Precession and Nutation

LIGHT.

Mr. PHILIP BRAHAM'S description of a Set of Lenses for the Accurate Cor-

rection of Visual Defect...

Mr. THOMAS STEVENSON'S description of a Paraboloidal Reflector for Light-

houses, consisting of silvered facets of ground-glass; and of a Differential

Holophote.....

Professor G. G. STOKES'S Notice of the Researches of the late Rev. William

Vernon Harcourt, on the Conditions of Transparency in Glass, and the Con-

nexion between the Chemical Constitution and Optical Properties of dif-
ferent Glasses

Mr. G. JOHNSTONE STONEY on one Cause of Transparency

on the advantage of referring the positions of

Lines in the Spectrum to a Scale of Wave-numbers..

Professor WILLIAM SWAN on the Wave-lengths of the Spectra of the Hydro-

carbons

The ABBÉ MOIGNO on the Poste Photographique...

Mr. R. SUTTON's Account of a New Photographic Dry Process.

HEAT.

Page

Mr. DONALD MFARLANE'S description of Experiments made in the Physical

Laboratory of the University of Glasgow to determine the Surface Conduc-

tivity for Heat of a Copper Ball

........

Mr. WILLIAM LADD on a Respirator for Use in Extinction of Fires ...

Professor BALFOUR STEWART on the Temperature-equilibrium of an Enclosure

in which there is a Body in Visible Motion..

Professor CH. V. ZENGER on a new Steam-gauge

ELECTRICITY AND MAGNETISM.

Mr. THOMAS BLOXAM on the Influence of Clean and Unclean Surfaces in Vol-

taic Action

Mr. LATIMER CLARK on a new Form of Constant Galvanic Battery

Dr. J. P. JOULE'S Notice of and Observations with a New Dip-circle

Professor TAIT on Thermo-electricity......

Mr. C. F. VARLEY on a Method of Testing Submerged Electric Cables...... 48

Professor CH. V. ZENGER on a New Key for the Morse Printing Telegraph.. 48

METEOROLOGY.

Dr. BUYS BALLOT on the Importance of the Azores as a Meteorological Sta-

tion

.......

Dr. ALEXANDER BROWN on the Mean Temperature of Arbroath. Lat. 56°33′35′′

North, Long. 2° 35' 30" W. of Greenwich

....

Dr. WILLIAM B. CARPENTER on the Thermo-Dynamics of the General Oceanic

Circulation

Rev. Professor CHALLIS on the Mathematical Theory of Atmospheric Tides. 51

Professor COLDING'S Remarks on Aërial Currents....

Professor J. D. EVERETT on Wet- and Dry-bulb Formulæ ....

Mr. W. PENGELLY on the Influence of the Moon on the Rainfall

Mr. R. RUSSELL on the Inferences drawn by Drs. Magnus and Tyndall from

their Experiments on the Radiant Properties of Vapour

Mr. WILLIAM A. TRAILL on Parhelia, or Mock Suns, observed in Ireland

THE PROGRESS OF SCIENCE.

Lieut.-Col. A. STRANGE on Government Action on Scientific Questions

Rev. W. TUCKWELL on the Obstacles to Science-Teaching in Schools

CHEMISTRY.

Address by Professor ANDREWS, F.R.S.L. & E., President of the Section.... 59

Mr. THOMAS AINSWORTH on the Facts developed by the Working of Hæma-

tite Ores in the Ulverstone and Whitehaven Districts from 1844-71 ...... 66

CONTENTS.

Dr. ANDREWS on the Dichroism of the Vapour of Iodine

on the Action of Heat on Bromine......

.....

Professor APJOHN's Remarks upon the Proximate Analysis of Saccharine

Matters

M. GUSTAV BISCHOF on the Examination of Water for Sanitary purposes

Mr. PHILIP BRAHAM on the Crystallization of Metals by Electricity.....

Mr. J. Y. BUCHANAN on the Rate of Action of Caustic Soda on a watery Solu-

tion of Chloracetic Acid at 100° C.

.....

vii

Page

Dr. F. CRACE-CALVERT on the Estimation of Sulphur in Coal and Coke.... 68

Mr. JOHN DALZELL and Dr. T. E. THORPE on the Existence of Sulphur Di-
chloride......

....

Mr. HENRY DEACON on Deacon's Chlorine Process as applied to the Manufac-

ture of Bleaching-powder on the larger Scale.

Professor DELFFS on Sorbit ...

on the Detection of Morphine by Iodic Acid

Dr. J. H. GLADSTONE and ALFRED TRIBE's Experiments on Chemical Dy-
namics

.....

Mr. WILLIAM HARKNESS'S Preliminary Notice on a New Method of Testing
Samples of Wood-Naphtha

....

The Rev. H. HIGHTON on a Method of Preserving Food by Muriatic Acid.. 73

Dr. J. SINCLAIR HOLDEN on the Aluminous Iron-ores of Co. Antrim

Professor N. STORY MASKELYNE on the Localities of Dioptase

on Andrewsite

Dr. T. MOFFAT on Ozonometry...

The ABBÉ MOIGNO on the Photographic Post

Mr. PATTISON MUIR on an Añtimony-ore from New Zealand.

Dr. T. L. PHIPSON on Regianic Acid

......

...

Dr. J. EMERSON REYNOLDS on the Action of Aldehyde on the two Primary

Ureas..

water....

.....

on the Analysis of a singular Deposit from Well-

Dr. OTTO RICHTER on the Chemical Constitution of Glycolic Alcohol and its

Heterologues, as viewed in the new light of the Typo-nucleus Theory ....

Mr. WILLIAM CHANDLER ROBERTS on the Molecular arrangement of the Alloy

of Silver and Copper employed for the British Silver Coinage..

Mr. E. C. C. STANFORD on the Retention of Organic Nitrogen by Charcoal.. 81

Mr. JOHN SMYTH, Jun., on Improvements in Chlorimetry .....

Dr. T. E. THORPE's Contributions to the History of the Phosphorus Chlorides 81

Mr. C. R. C. TICHBORNE on the Dissociation of Molecules by Heat ........ 81

Mr. C. TOMLINSON on the behaviour of Supersaturated Saline Solutions when

exposed to the open air

Mr. J. A. WANKLYN on the Constitution of Salts....

Mr. C. GILBERT WHEELER on the Recent Progress in Chemistry in the United

States

Page

Mr. C. R. A. WRIGHT and CHARLES H. PIESSE on the Oxidation products

of the Essential Oil of Orange-peel, known as "Essence de Portugal ... 83

Mr. C. R. A. WRIGHT on certain new Derivatives from Codeia ....

GEOLOGY.

Address by ARCHIBALD GEIKIE, F.R.S., President of the Section ....

The Rev. J. F. BLAKE on the Yorkshire Lias and the Distribution of its

Ammonites

Mr. D. J. BROWN on the Silurian Rocks of the South of Scotland .......

on the Upper Silurian Rocks of the Pentland Hills and

Lesmahago

Dr. ROBERT BROWN'S Geological Notes on the Noursoak Peninsula and Disco

Island in North Greenland.

Dr. BRYCE on certain Fossils from the Durine Limestone, N.W. Suther-

land

Mr. W. CARRUTHERS on the Vegetable Contents of Masses of Limestone

occurring in Trappean Rocks in Fifeshire, and the conditions under which

they are preserved

.....

Mr. JOHN CURRY on the General Conditions of the Glacial Epoch; with Sug-

gestions on the formation of Lake-basins. ...

Mr. R. DAINTREE on the General Geology of Queensland

Mr. W. BOYD DAWKINS on the Relation of the Quaternary Mammalia to the

Glacial Period ....

... 98

Prof. GEIKIE on the Progress of the Geological Survey in Scotland

Mr. D. GRIEVE on the Fossiliferous Strata at Lochend near Edinburgh

Mr. G. J. GRIEVE on the position of Organic Remains near Burntisland

Sir RICHARD GRIFFITH, Bart., on "The Boulder Drift and Esker Hills of

Ireland," and "On the position of Erratic Blocks in the Country"........ 98

The Rev. J. GUNN on the Agency of the Alternate Elevation and Subsidence

of the Land in the formation of Boulder-clays and Glaciers, and the Exca-

vation of Valleys and Bays

100

101

Mr. JOHN HENDERSON on the Age of the Felstones and Conglomerates of the

Pentland Hills......

Professor EDWARD HULL and Mr. WILLIAM A. TRAILL on the relative ages

of the Granitic, Plutonic, and Volcanic Rocks of the Mourne Mountains and

Slieve Croob, Co. Down, Ireland

101

The Rev. Dr. HUME on the Coal-beds of Panama, in reference mainly to their

Economic Importance...

103

Mr. CHARLES LAPWORTH and JAMES WILSON on the Silurian Rocks of the

Counties of Roxburgh and Selkirk

103

....

Mr. CHARLES LAPWORTH on the Graptolites of the Gala Group

Mr. P. W. STUART MENTEATH on the Origin of Volcanoes.

104

Mr. L. C. MIALL's further Experiments and Remarks on Contortion of Rocks 106

Mr. JOHN MILLER on the so-called Hyoid plate of the Asterolepis of the Old

Red Sandstone.....

106

Mr. D. MILNE-HOME on the Conservation of Boulders....

107

Mr. W. S. MITCHELL'S further Remarks on the Denudation of the Bath

Oolite

107

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