Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
East Moors Works, report
Single page, typed in black ink on cream paper. Results of tests on the manufacture of Dowlais tap-hole clay containing "nettle" fireclay. Dated 14/4/50.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.