Slate used for vent, Goetre Isaf Type Item Uploaded by Royal Commission on the Ancient and Historical Monuments of Wales
Extract on the ventilation of coal mines, from 'An Elementary Text-Book of Coal Mining, 1909, pages 206-207 [image 1 of 2] Type Item Uploaded by Gathering The Jewels
Title page from 'The Colliery Manager's Handbook' by Caleb Pamely, published 1904 [image 1 of 5] Type Item Uploaded by Gathering The Jewels
