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This illustration dates to the 1870s and shows a blast furnace in Great Britain, where the enormous
UMG25A05_331

This illustration dates to the 1870s and shows a b...

Smelting the Ore
UMG24A34_298

Smelting the Ore

Tapping the Blast Furnace
UMG24A34_299

Tapping the Blast Furnace

Slag run
UMG22A22_113

Slag run

Black slaves in a mine performing the washing process for the separation of the diamond from the slag.
UMG20B37_135

Black slaves in a mine performing the washing proc...