report on mines and quarries, appear in order of value, thus:
coal, iron ore, clay and shale, sandstone, limestone, igneous rocks,
salt, tin ore. Coal surpasses all the other minerals to such an extent
that, taking the year 1903 as a type, when the total value of the
mineral output was very nearly L70,000,000, that of coal is found to
approach L61,000,000.

Coal-fields.

The position of the various principal coal-fields has been indicated
in dealing with the physical geography of England, but the grouping of
the fields adopted in the official report may be given here, together
with an indication of the counties covered by each, and the percentage
of coal to the total bulk raised in each county. These figures are
furnished as a general demonstration of the geographical distribution
of the industry, but are based on the returns for 1903.

+----------------+-----------------------------+-------------+
| Coal-fields. | Counties. | Percentage. |
+----------------+-----------------------------+-------------+
| Northern | Durham | 22.37 |
| | Northumberland | 7.48 |
+----------------+-----------------------------+-------------+
| | Yorkshire (West Riding)[20] | 17.76 |
| Yorkshire, &c. | Derbyshire | 9.40 |
| | Nottinghamshire | 5.41 |
+----------------+-----------------------------+-------------+
| Lancashire | Lancashire | 15.26 |
| and Cheshire | Cheshire | 0.25 |
|................| Leicestershire | 1.31 |
| | Shropshire | 0.50 |
| Midland[21] | Staffordshire | 8.10 |
| | Warwickshire | 2.12 |
| | Worcestershire | 0.44 |
+----------------+-----------------------------+-------------+
| | Cumberland | 1.37 |
| | Gloucestershire[22] | 0.87 |
| Small detached | Somersetshire | 0.62 |
| | Westmorland | 0.07 |
| | Yorkshire (North Riding)[20]| .. |
+----------------+------------------