Appendix 383

INDEX 387

LIST OF LITHOGRAPHIC PLATES

FACING PAGE I.--Northern Constellations 124 II.--Equatorial Constellations 190 III.--Map of Mars 246 IV.--The Pleiades 344 Protractor In pocket at back of book

LIST OF FULL-PAGE ILLUSTRATIONS

FACING PAGE A Total Solar Eclipse Frontispiece The Harvard College Observatory, Cambridge, Mass. 24 Isaac Newton 46 Galileo Galilei 52 The Lick Observatory, Mount Hamilton, Cal. 60 The Yerkes Observatory, Williams Bay, Wis. 100 The Moon, one day after First Quarter 150 William Herschel 234 Pierre Simon Laplace 364

ASTRONOMY