Oeuvres M�tallurgiques de M. Jean-Christian Orschall, Inspecteur des Mines de S. A. S. le Land-Grave de He�se-Cassel : Contenant l'Art de la Fonderie, un Trait� de la Liquation, un Trait� de la Mac�ration des Mines, le Trait� des Trois Merveilles (Tr

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