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or THE

THIRTIETH MEETING

OF THE

BRITISH ASSOCIATION

TOE THE

ADVANCEMENT OP SCIENCE;

HELD AT OXFORD IN JUNE AND JULY 1860.

LONDON:
JOHN MURRAY, ALBEMARLE
S"l861.

STREET.

PEIKTED BY

TAYLOR AND FRANCIS, BED LION COURT, FLEET STREET.

1

[graphic]

Address by the Rev. Professor Price, President of the Section 1

Dr. Bbennecke Od some Solutions of the Problem of Tactions of Apollonius

of Perga by means of modern Geometry 4

Rev. Jambs Booth on a New General Method for establishing the Theory of

Conic Sections 4

■ on the Relations between Hyperconic Sections and Elliptic

Integrals 4

Mr. A. Cayley on Curves of the Fourth Order having Three Double Points... 4

Mr. Patrick Codt on the Trisection of an Angle 4

Rev. T. P. Kirkman on the Roots of Substitutions 4

Rev. T. Rennison on a new Proof of Pascal's Theorem 6

Professor H. J. Stephen Smith on Systems of Indeterminate Linear Equations 6

Professor Sylvester on a Generalization of Poncelet's Theorems for the Linear

Representation of Quadratic Radicals 7

Light, Heat.

Sir David Brewster on the Influence of very small Apertures on Telescopic

Vision 7

——— on some Optical Illusions connected with the Inversion

of Perspective 7

on Microscopic Vision, and a New Form of Microscope 8

————— on the decomposed Glass found at Nineveh and other

places , 9

Dr. J. H. Gladstone on his own Perception of Colours 12

on the Chromatic Properties of the Electric Light of .

Mercury 13

Professor Jellett on a New Instrument for determining the Plane of Polariza-

tion 13

Professor L. L. Lindelof on the Caustics produced by Reflexion 14

Professor Maxwell on the Results of Bernoulli's Theory of Gases as applied

to their Internal Friction, their Diffusion, and their Conductivity for Heat... 15

■ on an Instrument for Exhibiting any Mixture of the Co-

lours of the Spectrum 16

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