Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
East Moors Works, report
Twelve reports relating to tests on fireclay, tap-hole clay and silica brick for blast furnaces. Thirteen pages attached with a paperclip. Typed in black ink on cream paper.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.