Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
East Moors Works, report
Handwritten in pencil on cream, lined paper. Three pages attached with a paperclip. Page containing information relating to the average analysis of acid bessemer slag for manganese.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.