nus, 304;
condition of Venus, 256;
of great planets, 289;
Jovian markings, 297;
ages of stars, 375;
polarising photometer, 420, 421

THE END

BILLING AND SONS, LTD., PRINTERS, GUILDFORD

THE SYSTEM OF
THE STARS

BY

AGNES M. CLERKE

Hon. Member of the Royal Astronomical Society; Author of "History of
Astronomy During the Nineteenth Century" and "Problems in Astrophysics"

_SECOND EDITION_

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FROM THE PREFACE

Fifteen years have elapsed since the original publication of the present
work; and fifteen years count as a long spell of time where sidereal
research is in question. In preparing the Second Edition, accordingly, I
have introduced extensive modifications. Considerable sections of the
book have been recast, and all have been thoroughly revised. New
chapters have been inserted, old ones have been in large part
suppressed. Drastic measures of reform have, in short, been adopted,
with results that certainly import progress and (it is hoped) constitute
improvements. Most of the illustrations are entirely new; and I am under
great obligations for the use of valuable photographs and drawings,
among others, to Sir. David Gill, F.R.S., to Professor Hale and the
University Press of Chicago, to the Rev. W. Sidgreaves, S.J., to
Professors E. C. Pickering, Campbell, Barnard, and Frost, and to Dr. Max
Wolf of Heidelberg.

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PROBLEMS IN ASTROPHYSICS

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