It gives me pleasure to acknowledge that the experience acquired in making the astronomical drawings published in Volume VIII. of the Annals of the Harvard College Observatory, while I was connected with that institution, has been of considerable assistance to me in preparing this work; although no drawings made while I was so connected have been used for this series.
E. L. TROUVELOT.
Cambridge, March, 1882.
CONTENTS
[INTRODUCTION]
[LIST OF PLATES]
THE SUN
[GENERAL REMARKS ON THE SUN]
[SUN-SPOTS AND VEILED SPOTS]
[SOLAR PROTUBERANCES]
[TOTAL ECLIPSE OF THE SUN]
THE AURORAL AND ZODIACAL LIGHTS
[THE AURORA BOREALIS]
[THE ZODIACAL LIGHT]