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To Protect Polished Steel (flowers of zinc)

It is very soluble in dilute from Rust. Nothing is equal to pure sulphuric and muriatic acid, with the evoluparaffine for preserving the polished surface tion of hydrogen gas. The salts of zinc are of iron and steel from oxidation. The par- colorless. affine should be warmed, rubbed on, and then wiped off with a woolen rag. It will not change the color, whether bright or blue, and will protect the surface better than any varnish. 3307. To Protect Polished Metal from Rust. Take 10 pounds gutta-percha, 20 pounds mutton suet, 30 pounds beef suet, 2 gallons neats' foot oil, and 1 gallon rape oil.

Melt together until thoroughly dissolved and mixed, and color with a small portion of rose pink; oil of thyme or other perfuming matter may be added. When cold the composition Commercial zinc is never pure, and is ob. tained from the native sulphuret (zinc blende) or carbonate (calamine), by roasting those ores, and distilling them along with carbonaceous matter in a covered earthen crucible, having its bottom connected with an iron tube which terminates over a vessel of water situated beneath the furnace. The first portion that passes over contains cadmium and arsenic, and is indicated by what is technically called the brown blaze; but when the metallic vapor begins to burn with a blueish white flame, or the blue blaze commences, the alloyed with most of the metals. (Cooley.)