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Eisteddfod Genedlaethol Cymru - cyfansoddiadau a beirniadaethau File
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Traethawd: 'Improvement of Illumination of the Underground Workings of a Colliery with particular application to the "Coal face"' gan 'Reflector' ...,

Traethawd: 'Improvement of Illumination of the Underground Workings of a Colliery with particular application to the "Coal face"' gan 'Reflector' mewn teipysgrif a 'Deri-Mawr'. Rhannwyd y wobr rhwng William Davies, Pontllan-fraith, ac Ernest Watts, Coed-duon [rhif 286 yn y Rhestr Testunau].

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