[23] It is scarcely necessary to remark that, no importance is to be attached to the numerical relations in this and other passages. In the original work describing a zodiac-dome, the exact number of constellations representing fishes, dogs, or the like, would of course be mentioned; but any changes necessary to Homer’s purpose in describing a shield would unhesitatingly have been introduced by him subsequently. It is singular, however, that we should have here, and in the passage quoted farther on as referring to Orion and the Dogs, the number _two_ specially mentioned. The latter instance is the more remarkable inasmuch as the mention of men and hares would lead one to expect that more than two dogs would be introduced. I would suggest as a sufficient reason for this peculiarity that the verbal alterations necessary to pluralise some of the objects in the dome would be more easily effected than those necessary to undualise others. THE ‘KNOWLEDGE’ LIBRARY. EDITED BY RICHARD A. PROCTOR. SCIENCE BYWAYS. A Series of Familiar Dissertations on Life in Other Worlds. By RICHARD A. PROCTOR. Crown 8vo. 6_s._ The POETRY of ASTRONOMY. A Series of Familiar Essays on the Heavenly Bodies. By RICHARD A. PROCTOR. Crown 8vo. 6_s._ NATURE STUDIES. Reprinted from ‘Knowledge.’ By GRANT ALLEN, ANDREW WILSON, THOMAS FOSTER, EDWARD CLODD, and RICHARD A. PROCTOR. Crown 8vo. 6_s._ LEISURE READINGS. Reprinted from ‘Knowledge.’ By EDWARD CLODD, ANDREW WILSON, THOMAS FOSTER, A. C. RUNYARD, and RICHARD A. PROCTOR. Crown 8vo. 6_s._ The STARS in their SEASONS. An Easy Guide to a Knowledge of the Star Groups, in Twelve Large Maps. By RICHARD A. PROCTOR. Imperial 8vo. 5_s._ London: LONGMANS, GREEN, & CO. WORKS BY R. A. PROCTOR The SUN; Ruler, Light, Fire, and Life of the Planetary System. By R. A. PROCTOR, B.A. With Plates and Woodcuts. Crown 8vo. 14_s._ The ORBS AROUND US; a Series of Essays on the Moon and Planets, Meteors and Comets, the Sun and Coloured Pairs of Suns. With Chart and Diagrams. Crown 8vo. 7_s._ 6_d._ OTHER WORLDS than OURS; the Plurality of Worlds Studied under the Light of Recent Scientific Researches. With 14 Illustrations. Crown 8vo. 10_s._ 6_d._ The MOON: her Motions, Aspects, Scenery, and Physical Condition. With Plates, Charts, Woodcuts, and Lunar Photographs. Crown 8vo. 10_s._ 6_d._ UNIVERSE of STARS; Presenting Researches into and New Views respecting the Constitution of the Heavens. With 22 Charts and 22 Diagrams. 8vo. 10_s._ 6_d._ LIGHT SCIENCE for LEISURE HOURS; Familiar Essays on Scientific Subjects, Natural Phenomena, &c. 3 vols. crown 8vo. 7_s._ 6_d._ each. NEW STAR ATLAS for the Library, the School, and the Observatory, in 12 Circular Maps (with 2 Index Plates). Crown 8vo. 5_s._