Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Lantern slide
unknown
(photographer)
Stemming a shot hole in preparation for shotfiring. Used in Safety in Mines Research Board Pamphlet No.4.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.