Coalbrookdale foundry
https://youtu.be/qCAtbCeuEcU?t=26m42s
Abraham Darby & Industrial Revolution
https://www.youtube.com/watch?v=GEpTXRKB4sE&index=10&list=PLCpYM0jg1d5O9q4HnrWT29M3xEHYuxJn8
https://youtu.be/GEpTXRKB4sE?t=1m39s
Ironbridge Gorge, Coalbrookdale
https://youtu.be/Y4Syasft_5Y?t=1141
https://www.youtube.com/watch?v=BUnCmpD78Dg .
https://www.youtube.com/watch?v=ENpfFw-gQZs .
