Abstract

The thirteenth-century Hebrew texts that discuss salinity all ultimately go back to Aristotle's treatment of the subject in the Meteorology. However, in these Hebrew texts the question of what exactly makes the sea salty is answered in diverging ways. The oldest of them, the Otot ha-Shamayim, being the Hebrew translation of the Arabic paraphrase of the Meteorology, proposes various causes of the sea's salinity, to wit, the dry exhalation, the action of heat, and the admixture of an earthy substance. This is due partly to Aristotle's own ambiguity, and partly to the fact that his Greek commentators interpreted his words in different ways. Two later encyclopedias, the Midrash ha-Hokhma and the De'ot ha-Philosofim base their expositions of salinity on Ibn Rushd, whose two commentaries on the Meteorology contain various theories. The first encyclopedia opts for the action of heat as the major cause in producing saltiness, whereas the second attempts to explain in which way the various causes are interrelated by advisedly combining Ibn Rushd's accounts