Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

The French mathematician and historian of science Paul Tannery (1843-1904) worked as an administrator in the state tobacco industry while researching and publishing on a wide variety of topics, including editions of Fermat and Descartes as well as of the Greek mathematician Diophantus of Alexandria. This 1893 work reviews the history of ancient Greek astronomy, beginning with a survey of what the Greeks actually meant by the use of the terms 'astronomy' and 'astrology', and going on to consider the work of Pythagoras and the other pre-Socratics, Aristotle and the Alexandrian mathematicians. At its core is a detailed analysis of Claudius Ptolemy's Almagest, which attempts to trace each of the Greek master's theories - on the sphericity and circumference of the earth, on the sun, moon and planets, and on the prediction of eclipses - back to its historical origins in Greek mathematical and philosophical thought.