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
Handwritten in pencil on off-white paper. Two pages, containing the air compressor test figures for Bargoed power station, dates given on the document are 1923, 1927 and 1941. The document itself is dated March 1952. Loose within pink/peach card file with other documents relating to Middle Duffryn and Bargoed High Pressure Station.
