| FT. | IN. | FT. | IN. | ||
| 11. | Fire-clay, binds, with good ironstone,&c. | 18 | 6 | – | |
| 12. | Coal | 1 | 0 | ||
| 13. | Iornstone measures, fire-clay, &c. | 17 | 4 | – | |
| 14. | Coal | 5 | 10 | ||
| 15. | Fire-clay, rock, and binds, with ironstone, &c. | 64 | 4 | – | |
| 16. | Coal | 6 | 6 | ||
| 17. | Fire-clay | 2 | 9 | – | |
| 18. | Coal | 1 | 0 | ||
| 19. | Fire-clay, clod, etc. | 16 | 8 | – | |
| 20. | Coal | 3 | 4 | ||
| 21. | Various measures | 77 | 9 | – | |
| 399 | 5 | 37 | 10 | ||
| 37 | 10 | ||||
| Total | 437 | 3 | |||
(See Vertical Sections, sheet 16, No. 4.)
It would be very unsafe to draw conclusions from a mere resemblance in the thicknesses and grouping of beds in two sections more than a mile apart, but looking both to the fact of the occurrence of ironstone, and the near agreement in thickness, it seems very probable that the bed numbered 13 in the Copy Hall section, is the same as that numbered 14 in the Aldridge trial pits. The resemblance is very striking, if we place side by side the following parts of the two sections: —
| Coppy Hall. | Aldridge. | |||||
| No. | Thickness. | No. | Thickness. | |||
| FT. | IN. | FT. | IN. | |||
| Fireclay, Einds, &c. | 6 | 92 | 8 | 7 | 86 | 6 |
| Coal with batt | 7 | 2 | 3 | 8 | 3 | 6 |
| Binds and fire-clay with ironstone | 8 | 33 | 7 | 9 | 31 | 7 |
| Coal | 9 | 7 | 6 | 10 | 7 | 8 |
| Binds and fire-clay with ironstone | 10 | 11 | 0 | 11 | 18 | 6 |
| Coal | 11 | 1 | 0 | 12 | 1 | 0 |
| Binds, &c and ironstone measures | 12 | 12 | 10 | 13 | 17 | 4 |
| Coal | 13 | 4 | 0 | 14 | 5 | 10 |
Over No. 6 in the Coppy Hall shaft there are several coals and batts with partings, while over No. 7 of Aldridge there are likewise some small conls and bats, separated, however, not by mere partings, but by groups of beds, though not of large thickness, these being surmounted by 55 feet of various measures, which may very well be the lower part of the 140 feet of measures grouped as No. 4 in the Coppy Hall colliery. In this case the beds which reached the surface at the Aldridge shaft would be about 340 feet deep at the Coppy Hall colliery. If we might be permitted to extend our comparison from the eastern to the western side of the coal-field, and to suppose that the small coals and batts which are numbered 2 to 6 inclusive in the Aldridge section, and those, marked No. 5 in the Coppy Hall section were the same group, there or thereabouts, as the group of small coals and partings numbered as No. 20 to 29 in the Essington section, given at page 94, we should
