"'Thou wert the morning star among the living Ere thy pure light had fled, Now having died, thou art as Hesperus, giving New splendour to the dead.'"[529] Sir David Brewster has well said,[530] "Isaiah furnishes us with a striking passage, in which the occupants of the earth and the heavens are separately described, 'I have made the earth, and created man upon it: I, even My hands, have stretched out the heavens, and all _their_ host have I commanded' (Isaiah xlv. 12). But in addition to these obvious references to life and things pertaining to life, we find in Isaiah the following remarkable passage: 'For thus saith the Lord that created the heavens; God Himself that formed the earth and made it; He hath established it, _He created it not_ IN VAIN, He formed _it to be inhabited_' (Isaiah xlv. 18). Here we have a distinct declaration from the inspired prophet that the _earth would have been created_ IN VAIN _if it had not been formed to be inhabited_; and hence we draw the conclusion that as the Creator cannot be supposed to have made the worlds of our system and those in the sidereal system in vain, they must have been formed to be inhabited." This seems to the present writer to be a good and sufficient reply to Dr. Wallace's theory that our earth is the only inhabited world in the Universe![531] Such a theory seems incredible. The recent discovery made by Prof. Kapteyn, and confirmed by Mr. Eddington, of two drifts of stars, indicating the existence of _two_ universes, seems to render untenable Dr. Wallace's hypothesis of the earth's central position in a single universe.[531] NOTE ADDED IN THE PRESS. While these pages were in the Press, it was announced, by Dr. Max Wolf of Heidelberg, that he found Halley's comet on a photograph taken on the early morning of September 12, 1909. The discovery has been confirmed at Greenwich Observatory. The comet was close to the position predicted by the calculations of Messrs. Cowell and Crommelin of Greenwich Observatory (_Nature_, September 16, 1908). INDEX A Aboukir, 287 Aboul Hassan, 221 Abu Ali al Farisi, 225 Abu-Hanifa, 233, 234 Abul-fadl, 236 Accadians, 250, 252 Achernar, 275 Aclian, 282 Adam, 96, 347 Adhad-al-Davlat, 225, 236 Adonis, 261 Adreaansz, 342 Airy, Sir G. B., 87, 140, 347, 357 Aitken, 160 Al-Battani, 232, 233 Albrecht, 173 Albufaragius, 283 Alcor, 241 Alcyone, 137 Aldebaran, 60, 156, 236, 252, 257, 310, 311 Alfard, 236, 289 Alfargani, 286 Alfraganus, 281 Almagest, 281 Al-Sufi, 47, 149, 179, 189, 221, 224, 225-238, 244, 246, 250, 251, 253, 254, 261, 263, 264, 266-270, 272, 274-278, 285, 287, 289, 290, 293, 298, 300-302, 304, 307 Altair, 246 Ampelius, 262 Amphion, 257 Ancient eclipses, 52, 53 Anderson, 120, 277 Andromeda nebula, 198-206, 231 Annals of Ulster, 332 Antares, 60, 179, 310, 311 Anthelm, 300 Antinous, 248 Antlia, 302 Apollo, 257