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
Metal Haldane's tube with glass tube in centre. Engraved with numeric marking for 'Percentage of Black-Damp' and 'Percentage of Oxygen'. With wooden container (2012.44/2) and all in original black metal tube/container (2012.44/3).
