Prof. A. Schuster on the Number of Electrons conveying the

Conduction Currents in Metals

Page

151

Prof. E. Hagen and Prof. H. Rubens on some Relations

between the Optical and the Electrical Qualities of Metals. 157

Mr. Franz Leininger on the Relation of the Electric Charges

transported by Cathode and Canal Rays to the Exciting

Current

Prof. Karl Pearson on a Novel Instrument for Drawing

Parabolas. (Plate XV.)

Profs. E. Rutherford and H. T. Barnes on the Heating Effect

of the Radium Emanation

Contribution by Lord Kelvin to the Discussion on the Nature

of the Emanations from Radium which was opened by

Professor E. Rutherford at the Meeting of the British

Association last September

Rev. P. J. Kirkby on the Effect of the Passage of Electricity

through a Mixture of Oxygen and Hydrogen at Low

Pressures

Editorial Note

Notices respecting New Books:-

Dr. J. A. Fleming's Handbook for the Electrical

Laboratory and Testing Room, Vol. II. . . .

..

180

200

202

220

223

233

233

Prof. A. A. Michelson's Light Waves and Their Uses .. 235

Prof. E. Mathias's Le Point Critique des Corps Purs 235

Prof. A. Classen's Ausgewählte Methoden der Analyt-

ischen Chemie, Vol. II.

Annuaire pour l'an 1904

236

236

NUMBER XXXIX.-MARCH.

Prof. J. J. Thomson on the Structure of the Atom: an

Investigation of the Stability and Periods of Oscillation of

a number of Corpuscles arranged at equal intervals around

the Circumference of a Circle; with Application of the

results to the Theory of Atomic Structure

237

Mr. O. W. Richardson on the Solubility and Diffusion in

Solution of Dissociated Gases ...

266

Mr. J. R. Cotter on an Instrument for Drawing Conics

Prof. J. S. Townsend on the Charges on Ions

274

276

Mr. R. Appleyard on the Conductometer

281

Mr. T. C. Porter on a Method of Mechanically Reinforcing

Sounds. (Plate XVI.)

283

Mr. S. Skinner on the Photographic Action of Radium Rays. 288

Major S. G. Burrard on Deflexions of the Plumb-line in

India

292

Mr. P. E. B. Jourdain on the Transfinite Cardinal Numbers

of Number-Classes in General

294

Dr. J. Joly on the Motion of Radium in the Electric Field.. 303

Prof. H. Poincaré's La Science et l'Hypothèse

310

Proceedings of the Geological Society :-

Profs. C. L. Morgan & S. H. Reynolds on the Igneous

Rocks associated with the Carboniferous Limestone

of the Bristol District

310

Mr. A. R. Short on the Rhætic Beds of England

Mr. & Mrs. Clement Reid on a Palæolithic Floor at Prah

311

Sands, in Cornwall

312

Mr. W. S. Boulton on the Igneous Rocks at Spring Cove,

near Weston-super-Mare....

313

Prof. H. N. Rau on a Deep-Sea Deposit from an Artesian

Boring at Kilacheri, near Madras

313

Prof. S. H. Reynolds and Mr. A. Vaughan on the Rhætic

Beds of the South-Wales Direct Line

314

Intelligence and Miscellaneous Articles :—

Note on 66

Obituary Notice: Dr. William Francis

," by R. Chartres

315

315

NUMBER XL.-APRIL.

Prof. D. B. Brace on Double Refraction in Matter moving

through the Ether

317

Mr. S. Skinner on the Occurrence of Cavitation in Lubrication.

(Plates XVII-XIX.)

329

Prof. W. McF. Orr on the Radiation from an Alternating

Circular Electric Current ..

336

Messrs. Simmance and Abady on the Simmance-Abady

Flicker" Photometer. (Plate XX.)....

341

66

347

Prof. F. T. Trouton and Mr. E. S. Andrews on the Viscosity

of Pitch-like Substances

Prof. J. A. McClelland on the Emanation given off by Radium. 355

Prof. J. A. McClelland on the Comparison of Capacities in

Electrical Work; an Application of Radioactive Substances. 362

Prof. R. Threlfall on a New Form of Sensitive Hot-Wire

Voltmeter ...

371

Prof. R. W. Wood on some New Cases of Interference and

Diffraction. (Plate XXI.)

376

Messrs. L. Holborn and L. W. Austin on Disintegration of

the Platinum Metals in Different Guses....

Dr. W. Watson on a Quartz-Thread Vertical Force Magneto-

graph. (Plates XXII. & XXIII.) .....

388

393

Mr. G. W. Walker on Stresses in a Magneto-static Field

Mr. W. Sutherland on the Dielectric Capacity of Atoms

Mr. W. Sutherland on the Crémieu-Pender Discovery

Page

405

Mr. H. Darwin on an Electric Thermostat. (Plate XXIV.). 408

Notices respecting New Books :-

:-

Dr. Johannes Stark's Die Dissoziierung und Umwandl-

ung Chemischer Atome

Proceedings of the Geological Society:-

Lieut.-Col. T. English on Eocene and Later Formations

surrounding the Dardanelles

414

... 414

Dr. C. Davison on the Derby Earthquakes of March 24th

and May 3rd, 1903

416

NUMBER XLI.-MAY.

Mr. W. Sutherland on the Electric Origin of Rigidity and

Consequences

Prof. H. Nagaoka on the Kinetics of a System of Particles

illustrating the Line and the Band Spectrum and the Pheno-

mena of Radioactivity ..

417

445

Mr. R. A. Houstoun's Spectroscopic Notes

456

Mr. S. H. Burbury on the Kinetic Theory of Gases.

467

Mr. R. Hosking on the Electrical Conductivity and Fluidity

of Solutions

469

Mr. J. Barnes on the Analysis of Bright Spectrum Lines.

(Plates XXV. & XXVI.)...

Dr. C. Chree on the Whirling and Transverse Vibrations of

Rotating Shafts

485

.. 504

Mr. C. G. Barkla on the Energy of Secondary Röntgen Radiation 543

Mr. S. C. Laws on the Thomson Effect in Alloys of Bismuth

and Tin .....

.. 560

Prof. J. Larmor on the Intensity of the Natural Radiation

from Moving Bodies and its Mechanical Reaction........ 578

Prof. J. A. Fleming on the Measurement of Small Inductances

and Capacities, and on a Standard of Small Inductance

Prof. J. A. Fleming on a Hot-Wire Ammeter for the Measure-

ment of very small Alternating Currents

Notices respecting New Books:—

586

595

Mr. E. T. Whittaker's Course of Modern Analysis .... 605

Mr. H. Hilton's Mathematical Crystallography and the

Theory of Groups of Movements

Prof. P. Duhem's Thermodynamics and Chemistry

Prof. S. Young's Fractional Distillation..

Intelligence and Miscellaneous Articles :-

An Instrument for Drawing Conics, by Mr. J. R. Cotter. 608

NUMBER XLII.-JUNE.

Lord Kelvin on Deep-water Two-dimensional Waves produced

by any given Initiating Disturbance

Prof. J. Larmor on the ascertained Absence of Effects of

Motion through the Æther, in relation to the Constitution

of Matter, and on the FitzGerald-Lorentz Hypothesis

Dr. E. P. Harrison on the Temperature-Variation of the

Coefficient of Expansion of Pure Nickel......

Prof. J. A. Pollock: A Comparison of the Periods of the

Electrical Vibrations associated with Simple Circuits. With

an Appendix by J. C. Close....

Page

609

.... 626

635

Mr. O. U. Vonwiller: Contribution to the Study of the

Dielectric Constant of Water at Low Temperatures...... 655

Mr. E. W. Morley on the Vapour-Pressure of Mercury at

Ordinary Temperatures

Prof. M. Smoluchowski-Smolan on the Principles of Aero-

dynamics and their Application, by the Method of Dynamical

Similarity, to some special Problems

662

... 667

Mr. C. T. R. Wilson on the Condensation Method of Demon-

strating the Ionisation of Air under Normal Conditions .. 681

Dr. G. Johnstone Stoney on Escape of Gases from Atmo-

spheres...

... 690

Mr. W. Bennett on Non-homocentric Pencils, and the

Shadows produced by them.-I. An Elementary Treat-

ment of the Standard Astigmatic Pencil ....

Mr. W. Bennett on Non-homocentric Pencils, and the

Shadows produced by them.-II. Shadows produced by

Axially Symmetrical Pencils possessing Spherical Aberra-

tion. (Plate XXVII.)

Index

700

706

716

PLATES.

I. & II. Illustrative of Dr. G. E. Allan's Paper on the Magnetism of Basalt and the Magnetic Behaviour of Basaltic Bars

when Heated in Air.

III-XI. Illustrative of Dr. E. Weintraub's Paper on the Arc in
Metallic Vapours in an Exhausted Space.

XII. & XIII. Illustrative of Mr. C. A. Chant's Paper on the Variation of Potential along the Transmitting Antenna in Wireless Telegraphy.

XIV. Illustrative of Mr. S. J. Allan's Paper on the Radioactivity
of the Atmosphere.

XV. Illustrative of Prof. Karl Pearson's Paper on a Novel
Instrument for Drawing Parabolas.

XVI. Illustrative of Mr. T. C. Porter's Paper on a Method
of Mechanically Reinforcing Sounds.

XVII-XIX. Illustrative of Mr. S. Skinner's Paper on the Occurrence of Cavitation in Lubrication.

XX. Illustrative of Messrs. Simmance and Abady's Paper on
the Simmance-Abady "Flicker" Photometer.

XXI. Illustrative of Prof. R. W. Wood's Paper on some new
Cases of Interference and Diffraction.

XXII. & XXIII. Illustrative of Dr. W. Watson's Paper on a Quartz-
Thread Vertical Force Magnetograph.

XXIV. Illustrative of Mr. H. Darwin's Paper on an Electric
Thermostat.

XXV. & XXVI. Illustrative of Mr. J. Barnes's Paper on the Analysis of Bright Spectrum Lines.

XXVII. Illustrative of Mr. W. Bennett's Paper on Non-homocentric
Pencils, and the Shadows produced by them.