(p. 217). Lord Kelvin's estimate as quoted was expressed to the writer verbally. I do not know whether he has anywhere given a similar written verdict.

Many of the works of Archimedes are lost, but the following have come down to us: (1) On the Sphere and Cylinder; (2) The Measure of the Circle; (3) Conoids and Spheroids; (4) On Spirals; (5) Equiponderants and Centres of Gravity; (6) The Quadrature of the Parabola; (7) On Bodies Floating in Liquids; (8) The Psammites; (9) A Collection of Lemmas.

A History of Science, Volume 5(of 5) — Part 138

Magnitudes and Distances of the Sun and Moon is the only surviving work. In the Armarius of Archimedes another work of Aristarchus is quoted--the one in which he anticipates the discovery of Copernicus. Delambre, in his Histoire de Vastronomie ancienne, treats fully the discoveries of Aristarchus.

A History of Science, Volume 5(of 5) — Part 138

An edition of Aristotle was published by Aldus, Venice, 1495-1498, 5 vols. During the following eighty years seven editions of the Greek text of the entire works were published, and many Latin translations.

A History of Science, Volume 5(of 5) — Part 138

The fragments of Berosus have been trans, by I. P. Cory, and included in his Ancient Fragments of Phoenician, Chaldean, Egyptian, and Other Writers, London, 1826; second edition, 1832.

Fragments only of the numerous works ascribed to Democritus have been preserved. Democriii Abdereo operum fragmenta, Berlin, 1843, edited by F. G. A. Mullach. Diodorus Siculus. See vol. i., p. 77.

The Historical Library. Perhaps the best available editions of Diodorus are Wesseling's, 2 vols.; Amstel, 1745; and Dindorf's, 5 vols., Leipzig, 1828-1831. English trans, by Booth, London, 1700. Diogenes Laertius. See vol. i., p. 121.

The Lives and Opinions of Eminent Philosophers (trans. by C. D. Yonge), London, 1853.

The fragments of his philosophical works were published at Berlin, 1822, under the title Eratosthenica. His poetical works were published at Leipzig, 1872. Euclid. See vol. i., p. 193.

His Elements of Geometry is still available as an English school text-book.

Galen (Claudius Galenus). See vol. i., p. 272.

Galen's preserved works are exceedingly bulky. The best-known edition is that of C. G. Kuhn, in 21 volumes.

The Pneumatics of Hero of Alexandria, from the original Greek. Trans, by B. Woodcroft, London, 1851. Herodotus. See vol. i.t p. 103.