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THE

LONDON, EDINBURGH, AND DUBLIN

PHILOSOPHICAL MAGAZINE

ᎪNᎠ .

JOURNAL OF SCIENCE.

CONDUCTED BY

SIR ROBERT KANE, LL.D. F.R.S. M.R.I.A. F.C.S.
SIR WILLIAM THOMSON, KNT. LL.D. F.R.S. &c.

AND

WILLIAM FRANCIS, PH.D. F.L.S. F.R.A.S. F.C.S.

"Nec aranearum sane textus ideo melior quia ex se fila gignunt, nec noster
vilior quia ex alienis libamus ut apes." JUST. LIPS. Polit. lib. i. cap. 1. Not.

VOL. XLIV.-FOURTH SERIES.
JULY-DECEMBER 1872.

LONDON.

TAYLOR AND FRANCIS, RED LION COUrt, fleet stREET,
Printers and Publishers to the University of London;

SOLD BY LONGMANS, GREEN, READER, AND DYER; KENT AND CO.; SIMPKIN, MARSHALL,
AND CO.; AND WHITTAKER AND CO.;—AND BY ADAM AND CHARLES BLACK,
AND THOMAS CLARK, EDINBURGH; SMITH AND SON, GLASGOW:-

HODGES, FOSTER, AND CO, DUBLIN:-PUTNAM, NEW
YORK:-AND ASHER AND CO., BERLIN.

Sci 90.9

Hayward Annel.
Jinti: 29, 1872-
Jan. 4, 1873.

"Meditationis est perscrutari occulta; contemplationis est admirari perspicua . . . . . Admiratio generat quæstionem, quæstio investigationem, investigatio inventionem."-Hugo de S. Victore.

-"Cur spirent venti, cur terra dehiscat,

Cur mare turgescat, pelago cur tantus amaror,
Cur caput obscura Phoebus ferrugine condat,
Quid toties diros cogat flagrare cometas;
Quid pariat nubes, veniant cur fulmina cœlo,
Quo micet igne Iris, superos quis conciat orbes
Tam vario motu."

J. B. Pinelli ad Mazonium.

HARV

UNI

ARY

12-28

CONTENTS OF VOL. XLIV.

(FOURTH SERIES.)

NUMBER CCXC.—JULY 1872.

Mr. J. Croll on What determines Molecular Motion?-the Fun-

damental Problem of Nature ..

Dr. A. M. Mayer on a new Lantern-Galvanometer

Canon Moseley on the steady Flow of a Liquid. (With a Plate.) 30

Mr. S. Taylor on Variations of Pitch in Beats

The Hon. J. W. Strutt on Mr. Moon's Views on Gaseous Pres-

Prof. A. Cayley on a Bicyclic Chuck

Notices respecting New Books :—

The Right Rev. J. W. Colenso and the Rev. J. Hunter's

Introductory Algebra, containing the chief rules in the

first part of Colenso's Elements of Algebra simplified;

with additional illustrations &c.

Archdeacon Pratt's Treatise on Attractions, Laplace's

Functions, and the Figure of the Earth

Proceedings of the Royal Institution:-

Mr. W. Spottiswoode on Optical Phenomena produced by
Crystals submitted to Circularly Polarized Light

Proceedings of the Royal Society :-

....

Dr. J. H. Gladstone and Mr. A. Tribe on the Decompo-
sition of Water by Zinc in conjunction with a more Ne-
gative Metal ..

On the Influence of Pressure on the Lines of the Spectrum, by

M. L. Cailletet .....

Further Researches on the Reflection of Heat, by M. P. Desains. 77

On Electrical Pyrometry, by Lieut. Abney, R.E., F.R.A.S.,

F.C.S., Assistant Instructor in Telegraphy, S.M.E., Chatham. 80

NUMBER CCXCI.-AUGUST.

M. E. Edlund on the Nature of Electricity ...

Mr. R. Moon's Reply to some Remarks of the Hon. J. W.

Strutt on Gaseous Pressure

Dr. J. W. Draper's Researches in Actino-Chemistry.—Memoir

First. On the Distribution of Heat in the Spectrum. (With

Prof. R. Clausius's necessary Correction of one of Mr. Tait's

Mr. R. W. Atkinson on the Atomic Theory, in Reply to Dr.

Mr. A. Tribe's Remarks on the alleged ambiguity, insufficiency,

and unnecessariness of the Atomic Theory

Prof. N. S. Shaler on Earthlight on the Moon

Mr. W. R. Birt's Contribution to our knowledge of Atmospheric

Notices respecting New Books :-

Mr. G. J. Symons's British Rainfall, 1871 ....

Proceedings of the Royal Society :-

Dr. J. H. Gladstone and Mr. A. Tribe on the Action of

Oxygen on Copper Nitrate in a state of Tension .... 139

The Astronomer Royal on a supposed Periodicity in the ele-

ments of Terrestrial Magnetism, with a period of 26 days. 141

Proceedings of the Geological Society :-

M. D. M. d'Orueta on the Geology of the neighbourhood

Prof. A. C. Ramsay on the River-courses of England and

Sir P. de M. Grey Egerton on Prognathodus Güntheri, a

new Genus of Fossil Fish from the Lias of Lyme Regis,

and on two specimens of Ischyodus, from the Lias of

Prof. J. Nicol on how the Parallel Roads of Glen Roy

M. C. J. A. Meyer on the Wealden as a Fluvio-lacustrine

Researches on the Electric Jet in Rarefied Gases, and in particular

on its Mechanical Force, by MM. A. de la Rive and E. Sar-

On the Electrical Condition of Gas-flames, by John Trowbridge,

Assistant Professor of Physics

On the Primary Spectrum of Iodine, by M. G. Salet..

On a simple Apparatus for the production of Ozone with Elec-

tricity of High Tension, by Professor Arthur W. Wright.. 156

On a singular appearance of Magnesium in the Chromosphere of

the Sun, by M. Tacchini, in a letter addressed to M. Faye.. 159

NUMBER CCXCII.-SEPTEMBER.

Mr. L. Schwendler on Differential Galvanometers

Mr. F. C. Webb on an Electrical Experiment with an Insulated

Dr. H. Hudson on Wave-Theories of Light, Heat, and Elec-

The Hon. J. W. Strutt on the Law of Gaseous Pressure

Proceedings of the Royal Society :-

Messrs. C. Tomlinson and G. van der Mensbrugghe on

Supersaturated Saline Solutions.-Part III. On a re-

lation between the Surface-tension of Liquids and the

Supersaturation of Saline Solutions

Proceedings of the Geological Society :-

Dr. Oldham and Mr. R. Mallet on some of the Secondary

Effects of the Earthquake of the 10th January, 1869, in

On the Influence of Pressure in the Phenomena of Endosmose

and Exosmose, by M. Becquerel

On the Action of Ozone upon Vulcanized Caoutchouc, by Prof.

Arthur W. Wright

On the instantaneous Oxidation of Alcohol, by M. A. Houzeau. 237

On some Effects of Slow Actions, produced in the course of a

certain number of years, by M. Becquerel

Reply to Professor Clausius, by P. G. Tait

NUMBER CCXCIII.-OCTOBER.

MM. Jamin and Richard on the Cooling of Gases

Mr. T. E. Thorpe on an Improved form of Filter-Pump. (With

M. H. F. Weber on the Specific Heat of Carbon

Dr. A. M. Mayer on a precise Method of tracing the Progress

and of determining the Boundary of a Wave of Conducted

M. G. Quincke on Electrolysis, and the Passage of Electricity

through Liquids...

Mr. J. W. L. Glaisher on some new Facts in the early History

of Logarithmic Tables

Mr. R. Moon on the Definition of Intensity in the Theories of

Light and Sound

Mr. J. Dewar on the Chemical Efficiency of Sunlight

Proceedings of the Royal Society:-

Dr. J. W. Mallet on the Gases occluded in Meteoric Iron

from Augusta Co., Virginia

Mr. G. Gore on some Properties of Anhydrous Liquefied

Report on a Memoir by MM. F. Lucas and A. Cazin, on the

Duration of the Electric Spark, by Edm. Becquerel ..

On a new Galvanic Pile, of Economic Construction, by M. Gaiffe. 320

On "Acoustical Experiments" &c., by Alfred M. Mayer 320

Prof. G. G. Stokes on the Law of Extraordinary Refraction

in Iceland Spar

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