OCR Text |
Show Galvanizing Brass and Copper. 1 (Vpprr nnd hniss nmy he coated with mrtitllie zlno In the fulUiwinp manner: man-ner: Place finely divided zinc In a nMiimetalMc vessel, und cover It with n concentrated solution of sal ammoniac. am-moniac. This Is healed to the hulling point, and the copper or hrass articles pre Introduced. A few minutes In the liollln hath will suffice to produce n firm and hrlllinnt covering over the surface of the work. The zinc can he reduced to the requisite fineness tiy pouring the melted metal Into mi iron mortar and pounding It with nn Iron pestle until the solid mass has been granulated to the desired fineness. Popular Mechanics Magazine. |