Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Oakeley slate quarry, photograph
Splitting a slab into pillars for removal from slate mine. This is done by means of specially prepared wedges hammered into holes bored in appropriate places.
At the critical moment the slate cracks with a audible 'ping'.
Pwnc
Diwydiant
Rhif yr Eitem
52.465/25
Mesuriadau
Meithder
(mm): 298
Lled
(mm): 251
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