| 1848 - 966 páginas
...perpendicularly round the pillars and ribs, in order to let the coals fall. Cog — A small square building ot rough stones, or coals, left to support the roof during the operation of holing. Cropping-oul — When the seam crops out at surface. Doggy — An underground superintendent, employed... | |
| 1849 - 604 páginas
...coal being cut perpendicularly round the pillars and ribs, in order to let the coals fall. Cog, — A small square building of rough stones, or coals,...to support the roof during the operation of holing. Crowbar. — Wrought-iron levers of various lengths, for rifting out the large coals. Capstan and Rope.... | |
| 1870 - 680 páginas
...eu pierre sčche, (Hainaut:) mureau m. ou murtia m., (Belg. :) muray ». Cog s. [South-Staffordsh.] (a small square building of rough stones or coals,...the roof during the operation of holing) (Min.) Die Bergversatzmauer, der Versalzpfeiler. Pilier m. de remblais. to Cog t>. a., to Join ta by cogging (Carp.)... | |
| 1848 - 492 páginas
...perpendicularly round the pillars and ribs, in order to let the coals fall. Cog — A small square building ol rough stones, or coals, left to support the roof during the operation of holing. Cropping-out — When the seam crops out at surface. Doggy— An underground superintendent, employed... | |
| |