materialprov

Tre (a-c) blytackor i form av halvklot.

Enligt en medföljande lapp: " Bly framställdes före de vitas ankomst till Kongo. Man eldade på marken där förekomsten av bly var. Så grävde man rännor och ledde det smälta blyet ner i gropar som man hackat i stenar, därav formen på blyklumparna. ... Se också Aldéns bok 'Kingoye-folket'. R Einebrant."

"Lead-ore (nsengu or nzaba) may be picked up in ravines, from sand in water-courses and from deep cuttings in dry hard earth. For the smelting, nsangula-branches are first broken into small pieces, perhaps fifty. These are placed in the smelting-pit, lead-ore, logs of wood and charcoal are placed on top, and the men begin to work with the bellows. If a nsangula-branch burns through while the smelting is going on it is immediately replaced with another. There is generally room for five budi-baskets of lead-ore at once in the smelting-pit. The smelted lead is hammered in the same way as the smelted copper. When the lead is completely smelted, it is poured into sand-moulds, and the billets are called teko or tekwa. They are then re-smelted to miloba bars, which may be cut in pieces or cast to form bullets. The slag from the first smelting is called makongo or nsadi, and the waste from the smelting that is still usable is known as budi or mabaata ("hail"). Laman, 1953, s 123.