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keyword: Science – 67 free books.
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All these books are free to read: either they're distributed with a free license, or they're in the public domain.
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Aphorisms and Reflections from the works of T. H. Huxley
Henrietta A Huxley (editor) and Thomas Henry Huxley (Author)
Scientific Culture, and Other Essays Second Edition; with Additions
Josiah P. Cooke, Jr. (Josiah Parsons)
Aphorisms and Reflections from the Works of T. H. Huxley
Henrietta A Huxley (editor) and Thomas Henry Huxley (Author)
Science for the School and Family, Part I. Natural Philosophy
Worthington Hooker