stuhlmann

Updated: May 23, 2025

I will only remind you that Schweinfurth and Petherick record the fact that in the northern part of East Africa smelting furnaces are worked without artificial air current and, on the other hand, Stuhlmann and Kollmann found near Victoria Nyanza that the natives simply mixed powdered ore with charcoal and by introduction of air currents obtained the metal.

W. E. B. (William Edward Burghardt) Du Bois - The Negro