Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Whiteford Lighthouse
The first known cast-iron British lighthouse was at Swansea Harbour and was built in 1803. The architect was Jernegan, and the plates were cast at the Neath Abbey Ironworks.