PREFACE

CONTENTS

LIST OF PLATES

ERRATA

ASTRONOMICAL DISCOVERY

CHAPTER I URANUS AND EROS Popular view of discovery.

CHAPTER II THE DISCOVERY OF NEPTUNE Search for definite objects.

CHAPTER III BRADLEY'S DISCOVERIES OF THE ABERRATION OF LIGHT AND OF THE NUTATION OF THE EARTH'S AXIS

CHAPTER IV ACCIDENTAL DISCOVERIES

CHAPTER V SCHWABE AND THE SUN-SPOT PERIOD Discoveries contrary to expectation.

CHAPTER VI THE VARIATION OF LATITUDE

INDEX

Astronomers Royal.

ASTRONOMICAL
DISCOVERY

BY

HERBERT HALL TURNER, D.Sc., F.R.S.

SAVILIAN PROFESSOR OF ASTRONOMY IN THE
UNIVERSITY OF OXFORD

WITH PLATES

LONDON
EDWARD ARNOLD
41 & 43 MADDOX STREET, W.
1904

(All rights reserved)

TO
EDWARD EMERSON BARNARD
ASTRONOMICAL DISCOVERER
THESE PAGES ARE INSCRIBED IN MEMORY OF
NEVER-TO-BE-FORGOTTEN DAYS SPENT WITH HIM AT THE
YERKES OBSERVATORY
OF
THE UNIVERSITY OF CHICAGO