Section Iv.—the Sidereal Heavens.

By J. E. Gore, F.R.A.S.

I. THE STARS AND CONSTELLATIONS 399 II. DOUBLE, MULTIPLE, AND COLOURED STARS 410 III. THE DISTANCES AND MOTIONS OF THE STARS 417 IV. BINARY STARS 431 V. VARIABLE AND TEMPORARY STARS 458 VI. CLUSTERS AND NEBULÆ 497 VII. THE CONSTRUCTION OF THE HEAVENS 538

LIST OF ILLUSTRATIONS

Frontispiece to Volume—PHOTOGRAPH OF THE MOON.