G B. Heckel · Educational Bureau: Paint Manufacturer's Association of the United States · leaf 26
The Materials o( Paint Manufacture cal compound. The product from mechanical furnaces, however, is almost completely oxi- dized to pure red lead. The black oxide of manganese, known to mineralogists as Pyrolusite, is a natural prod- uct, of which the principal sources of supply … Red Lead Furnace are in the Caucasus Mountains, in the Hartz Mountains in South America and elsewhere. Chemically, it is the dioxide of the metal man- ganese. The miners in the Caucasus are the wild mountaineers of eastern Europe, and the mineral, before it reaches America, passes through Southern…
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