LECTURES

ON

EXPERIMENTAL PHILOSOPHY,

&c. &c.

LONDON:

PRINTED BY THOMAS DAVISON, WHITEFRIARS.

ON

EXPERIMENTAL PHILOSOPHY,

ASTRONOMY,

AND

CHEMISTRY;

INTENDED CHIEFLY

For the Use of Students and Young Persons.

BY G. GREGORY, D.D.

LATE VICAR OF WEST HAM; DOMESTIC CHAPLAIN TO THE LORD
BISHOP OF LLANDAFF; AND AUTHOR OF THE ECONOMY

PRINTED FOR LONGMAN, HURST, REES, ORME, AND BROWN;
BALDWIN, CRADOCK, AND JOY; SCATCHERD AND
LETTERMAN; G. AND W. B. WHITTAKER;

AND

SHERWOOD, NEELY, AND JONES.

1820.

CONTENTS

ΤΟ

VOL. II.

LECTURE XXIII.

Page

The Vicissitudes of the Seasons, and the Divisions of