Page images
PDF
EPUB

"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.

CONTENTS OF VOL. XLVII.

(FOURTH SERIES.)

NUMBER CCCIX.-JANUARY 1874.

Mr. J. Y. Buchanan on an Apparatus for Gas-analysis.
(With a Plate.) . . . .

M. H. Herwig on the Disintegration of the Electrodes in the
Galvanic Arc of Light

Prof. Challis's Theory of the Source of Terrestrial Magnetism.
Mr. R. S. Brough on Wheatstone's Bridge.....
Prof. Challis's further Discussion of the Analytical Principles
of Hydrodynamics, in Reply to Mr. Moon...

Page

1

6

14

22

25

M. A. F. Sundell on the Electromotive and Thermoelectric
Forces of some Metallic Alloys in contact with Copper..
Mr. S. Roberts on a simple Condensing Collector for Fric-
tional Electrical Machines

28

49

Prof. W. F. Barrett on the Molecular Changes that accompany the Magnetization of Iron, Nickel, and Cobalt

51

Notices respecting New Books:

56

Mr. J. M. Wilson's Elementary Geometry

Proceedings of the Royal Society :

Dr. J. H. Gladstone and Mr. A. Tribe on an Air-Battery. 61
Mr. O. Reynolds on the Condensation of a Mixture of
Air and Steam upon Cold Surfaces

Proceedings of the Geological Society:

Mr. S. Sharp on the Oolites of Northamptonshire.—
Part II.

On some Phenomena of Illumination, by A. Lallemand

On a Process for verifying the Nodes in a Sounding Pipe, by
M. Bourbouze

NUMBER CCCX.—FEBRUARY.

Lord Rayleigh on the Manufacture and Theory of Diffractiongratings....

Mr. O. Heaviside on Wheatstone's Bridge.

Mr. J. Croll on the Physical Cause of Ocean-currents
Prof. W. H. Miller on Quartz, Ice, and Karstenite

Prof. E. C. Pickering's Measurements of the Polarization of
the Light reflected by the Sky and by one or more Plates of
Glass

67

74

77

[ocr errors]

80

81

93

94

122

127

Page

Mr. R. Moon's Remarks on the Analytical Principles of Hydrodynamics, in Reply to Professor Challis

143

Dr. Helmholtz on Galvanic Polarization in Liquids free from
Gas

145

Notices respecting New Books:

Mr. W. T. Pierce's Treatise on Practical Solid or Descrip-
tive Geometry: embracing Orthographic Projection and
Perspective or Radial Projection..

153

Prof. M. Yarnall's Catalogue of Stars observed at the
United States Naval Observatory during the years 1845
to 1871

On a new Determination of the Mechanical Equivalent of Heat, by H. Serrano y Fatigati.

155

155

On the Expansibility of Ebonite by Heat, by F. Kohlrausch.. 156 On the Discharge of Electrified Conductors, by J. Moutier .. 157

NUMBER CCCXI.-MARCH.

The Earl of Rosse on the Electric Resistance of Selenium .. 161 Mr. J. A. Phillips on the Composition of certain Mine Waters. 164 Mr. J. Croll on the Physical Cause of Ocean-currents. (With

168

a Plate.).....

M. H. Herwig on the Number and Weight of the Molecules
of Æther contained in Electric Conductors
Lord Rayleigh on the Manufacture and Theory of Diffraction-
gratings.

190

193

M. J. L. Soret on some Phenomena of Polarization by Diffusion of Light...

205

M. A. Terquem on the Transformation of the Vibroscope into
a Tonometer, and its employment for the Determination of
the Absolute Number of Vibrations
Notices respecting New Books :-

212

:

The Rev. S. Hawtrey's Introduction to the Elements of
Euclid

215

Proceedings of the Royal Society:

Lieut. Sale on the Action of Light on the Electrical Re-
sistance of Selenium ..

216

Mr. D. M'Kichan's Determination of the Number of
Electrostatic Units in the Electromagnetic Unit.... 218
Messrs. Stewart and Tait on the Heating of a Disk by
rapid Rotation in vacuo.....

219

Mr. F. Chambers on the Diurnal Variations of the Wind
and Barometric Pressure at Bombay

228

Proceedings of the Geological Society :

Dr. J. Bryce on the Jurassic Rocks of Skye and Raasay. 229
Mr. D. Mackintosh on the more remarkable Boulders of
the North-west of England and the Welsh Borders .. 230

Page

Mr. T. Davidson on some Brachiopoda collected by Mr.
Judd from the Jurassic Deposits of the East Coast of
Scotland..

230

Prof. D. T. Ansted on Solfataras and deposits of Sulphur
at Kalamaki ....

230

Mr. J. Lucas on the Origin of Clay-Ironstone
Dr. Dawson on Leptophloum rhombicum and Lepidoden-
dron gaspianum.

231

231

Capt. F. W. Hutton on the younger formations of New
Zealand

232

Mr. W. Carruthers on the Tree Ferns of the Coal-mea

sures

233

Mr. A. H. Schindler on the Geology of Kazirùn

233

The Rev. T. G. Bonney on the Lakes of the North-eastern
Alps

234

Signor B. Gastaldi on the Effects of Glacier-erosion in
Alpine Valleys

235

On the Limits of the effective Power of Microscopes, by Professor Helmholtz

236

Experimental Researches on Newton's Coloured Rings, by P.
Desains ..

236

On extraordinary developments of Light in the grinding of hard Stones, by Dr. Jacob Nöggerath

237

NUMBER CCCXII. APRIL.

Prof. J. P. Cooke on the Vermiculites; their Crystallographic and Chemical Relations to the Micas; together with a discussion of the Cause of the Variation of the Optical Angle in these Minerals (With a Plate.)

....

241

277

M. H. Vogel on the Sensibility to Light of Bromide of Silver
with respect to the so-called Chemically Inert Colours .... 273
Prof. Challis on the Effects produced by Fog and Vapour in
the Atmosphere on the Intensity of Sound
M. G. Lippmann on the Connexion between Capillary and
Electrical Phenomena. (With a Plate.)
Mr. R. Moon on the Measure of Work in the Theory of Energy. 291
M. F. Kohlrausch on the Determination of the Absolute Value
of the Siemens Mercury Unit of Electrical Resistance ...
Proceedings of the Royal Society :-

Sir B. C. Brodie on the Electric Decomposition of Car-
bonic-Acid Gas

281

294

309

Messrs. Lockyer and Roberts on the Quantitative Ana-
lysis of certain Alloys by means of the Spectroscope.. 311
Mr. J. A. Broun on the Period of Hemispherical Excess
of Sun-spots, and the 26-day Period of Terrestrial
Magnetism..

311

[merged small][merged small][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]
« PreviousContinue »