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 - See WASC 2229
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 - See WASC 2229
