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Un método mejorado para producir los compuestos cuprosos que se emplean para tratar las vides y demás plantas , con el fin de preservarlas de la filoxera, el mildew y de otras enfermedades análogas.
Un sistema de minas submarinas provistas de un casco longitudinal especial, semejante a los que se emplean para la pesca, en cuyas minas arranca del centro de las mismas el cable de amarre.