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THE

STORY OF THE HEAVENS.

BY

ROBERT STAWELL BALL, LL.D.,

FELLOW OF THE ROYAL SOCIETY OF LONDON, FELLOW OF THE ROYAL ASTRONOMICAL SOCIETY,
HONORARY MEMBER OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY, VICE-PRESIDENT

OF THE ROYAL IRISH ACADEMY, ANDREWS PROFESSOR OF ASTRONOMY IN THE
UNIVERSITY OF DUBLIN, AND ROYAL ASTRONOMER OF IRELAND.

With Coloured Plates and numerous Illustrations.

CASSELL & COMPANY, LIMITED:

LONDON, PARIS, NEW YORK & MELBOURNE.

1885.

[ALL RIGHTS RESERVED.]

NO VIMU AIMBOLIAD

ASTRONOMY DEPT.]

Gift of Botimian club.

QB43 842

PREFACE.

I HAVE to acknowledge the kind aid which I have received in the preparation of this book.

Mr. Nasmyth has permitted me to use some of the beautiful drawings of the Moon, which have appeared in the well-known work published by him in conjunction with Mr. Carpenter. To this source I am indebted for Plates VII., VIII., IX., X., and Figs. 26, 27, 28.

Professor Pickering has allowed me to copy some of the drawings made at Harvard College Observatory by Mr. Trouvelot, and I have availed myself of his kindness for Plates I., IV., XI., XII., XV.

I am indebted to Professor Langley for Plate II., to Mr. De la Rue for Plates III., and XIV., to Dr. Huggins for Fig. 16, to Professor C. Piazzi Smyth for Fig. 89, to Mr. Chambers for Fig. 6, which has been borrowed from his "Handbook of Descriptive Astronomy," to Dr. G. J. Stoney for Fig. 65, to Mr. Grubb for Fig. 4, and to Dr. Copeland and Dr. Dreyer for Fig. 59.

I have also to thank Dr. Copeland and Mr. L. H. Steele for their kindness in reading through the entire proofs; while I have also occasionally availed myself of the help of Mr. G. Cathcart.

ROBERT S. BALL.

OBSERVATORY,

DUNSINK,

CO. DUBLIN.

17th April, 1885.

703047

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