Museum

158

•H919 E5 1849

Naturæ vero rerum vis atque majestas in omnibus momentis fide caret, si quis modo partes
ejus ac non totam complectatur animo.-Plin., Hist. Nat., lib. vii. c. 1.

VOL. III.

LONDON:

HENRY G. BOHN, YORK STREET, COVENT GARDEN.

PRINTED BY HARRISON AND SON,

LONDON GAZETTE OFFICE, ST. MARTIN'S LANE,

AND

ORCHARD STREET, WESTMINSTER.

Ob-20-39 MEC

muslum

gt-wenley
6-17-39

CONTENTS OF VOL. III.

INTRODUCTION.

Historical Review of the attempts made with the object of con-

sidering the Phenomena of the Universe as a Whole

SPECIAL RESULTS OF OBSERVATIONS IN THE

DOMAIN OF COSMICAL PHENOMENA.

A. URANOLOGICAL PORTION of the physical description of the

world.

a. ASTROGNOSY..

I. The realms of space, and conjectures regarding that which

appears to occupy the space intervening between the heavenly

bodies

II. Natural and telescopic vision, 51-96; Scintillation of the stars,

99-111; Velocity of light, 111-119; Results of photo-

metry, 119-137

Page

1-28

.29-32

.33-50

.51-137

III. Number, distribution, and colour of the fixed stars, 138-

188; Stellar masses (stellar swarms), 188-193; The Milky

Way interspersed with a few nebulous spots, 193-203........138-203

IV. New stars, and stars that have vanished, 204-217; Variable

stars, whose recurring periods have been determined, 217—

240; Variations in the intensity of the light of stars whose

periodicity is as yet uninvestigated, 240-247

204-247

V. Proper motion of the fixed stars, 248-252; Problematical

existence of dark cosmical bodies, 252-255; Parallax-

measured distances of some of the fixed stars, 255-264;

Doubts as to the assumption of a central body for the

whole sidereal heavens, 264-270

248-270

VI. Multiple, or double stars-Their number and reciprocal dis-

tances.-Period of revolution of two stars round a common

centre of gravity

..271-289