| 1 | Embers glowed in the furnace. | |
| 2 | Coal was also the fuel that burned in the fireboxes of the new railway engines. | |
| 3 | Thermal fields are proved to be closely related to the furnace structures. | |
| 4 | It was not a combat, it was the interior of a furnace; there mouths breathed the flame; there countenances were extraordinary. | |
| 5 | So she made a fire on her hearth, and threw in some straw. |