Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
André João Antonil
José Caetano Gomes
M. Duhamel du Monceau
António de Almeida
Avelino Nunes d'Almeida
José Mariano da Conceição Velloso, Claude-Louis Berthollet, and Nicolas-Joseph Thiéry de Menonville
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Rafael Bluteau
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.