In November 1777, Abraham Darby III began designing and erecting 378 tons of cast iron, to build a bridge in the Shropshire gorge, on the banks of the River Severn.
The bridge was completed in 1779; this model was created as a guide to show how the bridge was built.
If the virtual tour doesn't play, you may need to download a free VRML plug-in (eg Cortona). BBC WebWise has a step-by-step guide to help you.
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