| Sample |
Description |
| The Consett Collieries |
| Fig. 1 — Ancient workings in Busty seam, Consett |
| Fig. 2 — Old workings in Hutton seam |
| Fig. 3 — Showing collapsed bord in old workings |
| Fig. 4 — 300-H.P. haulage operating the day-drift at Woodside, Humber Hill |
| Fig. 5 — Showing one of the endless type haulage units operated on the main-and-tail principle |
| Fig. 6 — Typical main-and-tail belt-driven haulage at work in Woodside drift, Humber Hill |
| Fig. 7 — Showing arrangement of endless-main-and-tail gear |
| Fig. 8 — Illustrating the method of mounting the wooden bearings |
| Fig. 9 — Fleeting wheel for clamping to main-and-tail drum |
| Fig. 10 — Tippler end of 210-yard scraper-type gate conveyor at work in the Woodside pit |
| Fig. 11 — Showing two 90-yard retreating face conveyors delivering on to gate conveyor illustrated in Fig. 10. |
| Fig. 12 — Part of the Woodside drift showing steel arch supports |
| Fig. 13 — Showing layout of retreating faces |
| Fig. 14 — Winning out in conjunction with longwall conveyor face |
| Fig. 15 — Showing construction of scraper chain for 250-yard gate conveyor |
| Fig. 16 — Illustrating typical faces supported by the props described in this article |
| Fig. 17 — Showing droove in rope wheel to facilitate passage of connecting sockets |
| Fig. 18 — General view of power house, Chopwell Colliery |
| Fig. 19 — Characteristic curves for variable-speed winder when winding coal and stone |
| Fig. 20 — Drawing showing construction and method of operating Williams-Janney variable-speed gear |
| Fig. 21 — 75-H.P. winder at Victory Pit incorporating Williams-Janney variable-speed gear |
| Fig. 22 — Ward-Leonard winding equipment at Busty Pit, Medomsley Colliery |
| Fig. 23 — Flywheel converter set operating in conjunction with winder shown in Fig. 22 |
| Fig. 16 — Illustrating typical faces supported by the props described in this article |
| Fig. 16 — Illustrating typical faces supported by the props described in this article |