3 Coal - Mine Surveying
6 Coal - A Miner Holing
11 Copper - Calcination of Copper Ore, Rio Tinto, Spain
17 Diamonds - Searching Tables, Kimberley Mines
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19 Gold - Descending a Mine, South Africa
28 Iron - Unloading Iron Ore, USA
33 Oil - Oil Field at Baku, Russia
34 Oil - An Oil Field in the Sea, Southern California
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40 Rubies - Mine at Mogok, Burma
43 Salt - Mine at Northwich, Cheshire
49 Tin - Open-cast Mnie, Perak
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