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LONDON, EDINBURGH, AND DUBLIN
JOURNAL OF SCIENCE.
SIR ROBERT KANE, LL.D. F.R.S. M.R.I.A. F.C.S.
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. XL.-FOURTH SERIES.
TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET,
SOLD BY LONGMANS, GREEN, READER, AND DYER; SIMPKIN, MARSHALL AND CO. ; WHITTAKER AND CO.; AND KENT AND CO., LONDON:-BY ADAM AND
CHARLES BLACK, AND THOMAS CLARK, EDINBURGH;
SMITH, DUBLIN; AND PUTNAM,
"Meditationis est perscrutari occulta; contemplationis est admirari perspicua . . . . . Admiratio generat quæstionem, quæstio investigationem, investigatio inventionem."-Hugo de S. Victore.
CONTENTS OF VOL. XL.
Mr. J. Ball on the Cause of the Descent of Glaciers
Archdeacon Pratt's Reply to M. Delaunay's objection to the late
Mr. Hopkins's Method of determining the Thickness of the
Earth's Crust by the Precession and Nutation of the Earth's
Prof. E. Edlund on the Path of Electrical Induction- and Dis-
junction-Currents through Gases of various Densities, and
between Poles of different shapes
Mr. A. S. Davis on a possible Cause of the Bright Line observed
by M. Angström in the Spectrum of the Aurora Borealis
Mr. R. Moon on the Solution of Linear Partial Differential
Equations of the Second Order involving two Independent
Prof. von Bezold's Researches on the Electrical Discharge..
The Rev. J. M. Heath on the Interchangeability of Heat and
Proceedings of the Royal Society :-
Mr. Warren De La Rue, Dr. Balfour Stewart, and Mr. B.
Loewy on the Positions and Areas of the Spots observed
at Kew during the years 1864-66, also the Spotted Area
of the Sun's visible disk from the commencement of 1832
Mr. H. T. Brown on the Estimation of Ammonia in Atmo-
Mr. H. E. Roscoe and Dr. T. E. Thorpe on the Relation
between the Sun's Altitude and the Chemical Intensity
of Total Daylight in a Cloudless Sky
Prof. C. Piazzi Smyth on Supra-annual Cycles of Tempe-
The Rev. S. Haughton on the Constituent Minerals of the
Granites of Scotland, as compared with those of Donegal. 59
Proceedings of the Geological Society :-
Prof Huxley on Hypsilophodon, a new Genus of Dinosauria 68
Prof. Huxley on the Affinity between the Dinosaurian Rep