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Colour photograph of a family with horse-drawn carts, working in the iron mines n the Bakaly Hills of Russia's Ural Mountains
ARP17A12_407

Colour photograph of a family with horse-drawn car...

Iron-stained dolomite
ARP11A03_491

Iron-stained dolomite

Iron-stained dolomite
ARP11A03_490

Iron-stained dolomite

Sinking a mineshaft by Triger's method, 1841
ARP07112_009761P

Sinking a mineshaft by Triger's method, 1841

Perpetual motion machine
ARP07113_010330P

Perpetual motion machine