Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Graph
Graph and cover memo attached with a paperclip. Graph containing information relating to high top pressure blowing. Photocopy/ photographic photocopy?? on white paper. Also a memo to W.E. Simons (blast furnace dept.) re. the graph, typed in black ink on headed paper (Guest Keen Baldwins Iron & Steel Co. Ltd., East Moors Works).
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.