If you're looking for a particular book, search by title and/or author (e.g. Almagest by Ptolemy).
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The thirteen books of Euclid's Elements, translated from the text of Heiberg. Circulating Collecton, 3rd Floor / QA31.E875 1956. Also available from the Internet Archive.
Science and civilisation in China, by Joseph Needham. Circulating Collection, 3rd Floor / DS721 .N39
Thales of Miletus