OF THE

CAMBRIDGE

PHILOSOPHICAL SOCIETY.

ESTABLISHED NOVEMBER 15, 1819.

VOLUME THE SEVENTH.

CAMBRIDGE:

PRINTED AT THE UNIVERSITY PRESS;

AND SOLD BY

JOHN WILLIAM PARKER, WEST STRAND, LONDON;

J. & J. J. DEIGHTON; AND T. STEVENSON, CAMBRIDGE.

M.DCCC.XLII.

CONTENTS OF THE SEVENTH VOLUME.

PART I.

No. I.

II.

PAGE

1

ON the Laws of the Reflexion and Refraction of Light at the common Surface

of two non-crystallized Media: by GEORGE GREEN, B.A. of Caius College....

On Molecular Equilibrium. Part I. By the Rev. PHILIP KELLAND, M.A., Queens'

College, Cambridge; Professor of Mathematics in the University of Edinburgh. 25

III. On Rolling Curves: by HAMNETT HOLDITCH, M.A., Fellow of Caius College. 61

IV. Note on the Motion of Waves in Canals: by GEORGE GREEN, B.A. of Caius

College..

V.

On the Nature of the Molecular Forces which Regulate the Constitution of the

Luminiferous Ether: by S. EARNSHAW, M.A. of St John's College....

VI. Supplement to a Memoir on the Reflexion and Refraction of Light: by G. GREEN,

B.A. of Caius College

...

87

97

115

PART II.

VII.

ON the Propagation of Light in Crystallized Media: by G, GREEN, B.A.

Fellow of Caius College

.....

VIII. On a Portion of the Tertiary Formations of Switzerland: by D. T. ANSTED,

M.A., Fellow of Jesus College. Fellow of the Society and of the Geological

Society; Professor of Geology in King's College, London

IX.

....

On the Quantity of Light intercepted by a Grating placed before a Lens; and

on the Effect produced by Interference: by the Rev. PHILIP KELLAND, M.A.,

F.R.SS.L. & É., late Fellow of Queens" College, Cambridge; Professor of

Mathematics in the University of Edinburgh

121

141

153

X.

On the Foundation of Algebra, No. I.: by AUGUSTUS DE MORGAN, F.R.A.S.,

F.C.P.S., of Trinity College; Professor of Mathematics in University College,

London...

173

XI.

XII.

.....

.......

On the Effect of the Non-Residence of Landlords, &c. on the Wealth of a

Community: by J. TOZER, M.A., of Caius College

Demonstration that all Matter is heavy: by the Rev. WILLIAM WHEWell,

B.D., Fellow of Trinity College and Professor of Moral Philosophy

On the Position of the Axes of Optical Elasticity in Crystals belonging to the

Oblique-Prismatic System: by W. H. MILLER, M.A., F.R.S., Fellow and

Tutor of St John's College, and Professor of Mineralogy in the University

of Cambridge,

XIV. On a New Construction of the Going-Fusee: by G. B. AIRY, Esq., Astronomer

Royal......

189

197

209

217