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"... La chute de l'empire romain et les invasions des barbares emp ch rent, pendant plusieurs si cles, non-seulement les progr s, mais l' tude de l'astronomie. Les conqu rants arabes et les califes mahom tans donn rent les premiers, une partie du monde, la tranquillit et l'ordre... Read Full Overview

This is a reproduction of a book published before 1923. 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... Read Full Overview

This is a reproduction of a book published before 1923. 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... Read Full Overview