These cookies are absolutely essential for our website to function properly.
We use Google Analytics to measure how you use the website so we can improve it based on user needs.
These cookies may be set by third party websites and do things like measure how you view YouTube videos.
Amgueddfa Cymru – Museum Wales
A Sullivan Ironclad Electric Machine in an anthracite colliery in South Wales. This is the "Gras Isaf" or Little Seam 19" high, and is cut at a speed of a foot a minute to a depth of 4½ feet. More Ironclad machines are used in holing anthractie in various parts of the world than any other make.
