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History
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Electric phosphate smelting furnace in a TVA chemical plant (1942)
Electric phosphate smelting furnace in a TVA chemical plant (1942)
Copper smelter, Chelyabinsk Oblast, Russia
Copper smelter, Chelyabinsk Oblast, Russia
Electrolytic cells at an aluminum smelter in Saint-Jean-de-Maurienne, France
Electrolytic cells at an aluminum smelter in Saint-Jean-de-Maurienne, France
Cowles Syndicate of Ohio in Stoke-upon-Trent England, late 1880s. British Aluminium used the process of Paul Héroult about this time.
Cowles Syndicate of Ohio in Stoke-upon-Trent England, late 1880s. British Aluminium used the process of Paul Héroult about this time.
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Manganese ore – psilomelane (size: 6.7 × 5.8 × 5.1 cm)
Manganese ore – psilomelane (size: 6.7 × 5.8 × 5.1 cm)
Lead ore – galena and anglesite (size: 4.8 × 4.0 × 3.0 cm)
Lead ore – galena and anglesite (size: 4.8 × 4.0 × 3.0 cm)
Granitic pegmatite composed of plagioclase and K-feldspar, large hornblende crystal present. Scale bar is 5.0 cm
Granitic pegmatite composed of plagioclase and K-feldspar, large hornblende crystal present. Scale bar is 5.0 cm
Piece of kimberlite. 11.1 cm x 4.5 cm
Piece of kimberlite. 11.1 cm x 4.5 cm