Subject: Braddock J. A Memoir on Gunpowder in which are discussed the Principles Both of its Manufacture and Proof. Including illustration of a saltpetre refinery -filtering trough and filters
Description: Braddock J. A Memoir on Gunpowder in which are discussed the Principles Both of its Manufacture and Proof. Including illustration of a saltpetre refinery -filtering trough and filters
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