His works on music are the following. A treatise on Rhythm and Harmony; one on Poetry; one on the beauty of Epic Poems; one on Euphonious and Discordant Letters; one on Homer, or on Propriety of Diction[129] and Dialects; one on Song, one on Words; the Onomasticon. These are his musical works.
The following are his works on art. Prognostics; a treatise on the Way of Living, called also Diætetics, or the Opinions of a Physician; Causes relating to Unfavourable and Favourable Opportunities; a treatise on Agriculture, called also the Georgic; one on Painting; Tactics, and Fighting in heavy Armour. These are his works on such subjects.
Some authors also give a list of some separate treatises which they collect from his Commentaries. A treatise on the Sacred Letters seen at Babylon; another on the Sacred Letters seen at Meroe; the Voyage round the Ocean; a treatise on History; a Chaldaic Discourse; a Phrygian Discourse; a treatise on Fever; an essay on those who are attacked with Cough after illness; the Principles of Laws; Things made by Hand, or Problems.
As to the other books which some writers ascribed to him, some are merely extracts from his other writings, and some are confessedly the work of others. And this is a sufficient account of his writings.
XIV. There were six people of the name of Democritus. The first was this man of whom we are speaking; the second was a musician of Chios, who lived about the same time; the third was a sculptor who is mentioned by Antigonus; the fourth is a man who wrote a treatise on the Temple at Ephesus, and on the city of Samothrace; the fifth was an epigrammatic poet, of great perspicuity and elegance; the sixth was a citizen of Pergamus, who wrote a treatise on Oratory.
LIFE OF PROTAGORAS.
I. Protagoras was the son of Artemon, or, as Apollodorus says (which account is corroborated by Deinon, in his History of Persia), of Mæander. He was a native of Abdera, as Heraclides Ponticus tell us, in his treatise on Laws; and the same authority informs us that he made laws for the Thurians. But, according to the statement of Eupolis, in his Flatterers, he was a native of Teos; for he says:—
Within you’ll find Protagoras, of Teos.
He, and Prodicus of Ceos, used to levy contributions for giving their lectures; and Plato, in his Protagoras, says that Prodicus had a very powerful voice.