The late Professor of the University of Patras, Panagiotis Siafarikas, forewords.
 It is the exclusive prerogative of the Ancient Greek sages to form the positive sciences into an autonomous branch of knowledge. Organization which is due solely to their intellectual efforts and especially to their developed intelligence. In the thought of the Greeks, the positive sciences are freed from religion and magic and rise above experience by acquiring the necessary scientific background. With Greek thought begins the scientific reduction of natural phenomena to natural causes and the replacement of supernatural forces by natural laws. As theoretical, interpretive and ontological, the positive sciences are genuine children of Greek genius and born Greek.
 This book contains, as its title indicates, the writings and works of the Ancient Greeks in the positive sciences (Mathematics, Astronomy, Physics, Meteorology, Geography, Mineralogy, Zoology, Botany, Music, Mechanics, Architecture, Alchemy, Shipbuilding, Cartography).
 It covers the period from the 13th BC. century up to the 6th AD Many of the authors we present have written other works, but we limit ourselves to those of the positive sciences.