Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Bricks from Slate Waste, A New Industry (article)
Content summary - Mentions Pantdreiniog Slate Quarry Co. Ltd. and its developments in 'slate waste', also the manufacture of Portland cement. Printed on one side of sheet of paper.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.