Arte de ensayar oro y plata: bosquejo ó descripcion comparativa de la copelacion de las substancias metálicas por medio del plomo ó del bismuto y operaciones para sacar el oro mas puro que por el metodo de la separacion ó apartado : con las láminas correspondientes
Balthasar-Georges Sage
Jan 1785 · por don Joachin Ibarra
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