Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Oakeley slate quarry, photograph
Two workmen using the 'jumper' for drilling pillaring holes. Drilling a hole along the line of cleavage prior to the insertion of a charge of gunpowder to split the rock.
Pwnc
Diwydiant
Rhif yr Eitem
52.465/12
Creu/Cynhyrchu
North Wales Newspaper Services
Derbyniad
donation
Mesuriadau
Meithder
(mm): 251
Lled
(mm): 300
Techneg
Black and white (monochrome photograph)
Photograph
Deunydd
Paper
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