Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Cwm Avon Works, plan
Plan of blast furnace. Scale of ¼ inch to 1 foot. August 6th 1844.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Plan of blast furnace. Scale of ¼ inch to 1 foot. August 6th 1844.