INTRODUCTION. THE GREEK AND ARABIC IDEAS OF THE WORLD, AS THE CHIEF INHERITANCE OF THE CHRISTIAN MIDDLE AGES IN GEOGRAPHICAL KNOWLEDGE. rabic science constitutes one of the main links between the older learned world of the Greeks and Latins and the Europe of Henry the Navigator and of the Renaissance. In geography it adopted in the main the results of Ptolemy and Strabo; and many of the Moslem travellers and writers gained some additional hints... more...