...Livingstone (1871) passed thirty smelting houses inone journey, and Cameron came across bellows with valves, andtribes who used knives in eating...
W.E.B. Du Bois 「The Negro」
..."Schweinfurth, Von Luschan, Boaz, and others incline to thebelief that the Negroes invented the smelting of iron and passed iton to the Egyptians and to modern Europe...
W.E.B. Du Bois 「The Negro」
...This wasthe invention of the smelting of iron...
Various 「The Journal of Negro History, Vol. I. Jan. 1916」
...A large fume of what bore many marks of arsenic arose from the crucible during the time of smelting it...
David Collins 「An Account of the English Colony in New South Wales, Vol. 2」
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