
The extractive industries 437
Table 15.7 Employment structure of Manchester cotton firms, 1841, and Cornish metal mines, 1837
Manchester cotton firms, 1841 Cornish metal mines, 1837
Number of Number of Number of Number of
Size of firm firms employees Share of total % mines employees Share of total %
Small 1–150 54 3,989 12.5 115 5,626 20.8
Medium 151–500 62 17,806 55.8 35 9,677 35.8
Large 501–1,000 8 5,408 17.0 5 3,317 12.3
Very Large 1001 & over 4 4,700 14.7 5 8,408 31.1
Total 12831,903 100 160 27,028 100
Source: Lemon 1838; Lloyd-Jones and Le Roux 1980.
mixed material but this was generally confined to the non-ferrous sector.
Everywhere major increases in output were produced mainly by a di-
rect multiplication of the numbers employed. There were two ways of
achieving this but both could incur expensive penalties. Either ‘adven-
turers’ (mining investors) could seek the lateral extension of working into
new, previously undeveloped areas, or they could follow the deposits to
greater depths. The former might be possible using existing extractive
practices but commonly involved much higher transport costs as mining
diverged from the established centres of consumption. The latter opened
new and often rich deposits but required high and continuing expendi-
tures on complex pumping, drawing and ventilation processes. Also, as
underground workings radiated out from deep shafts, an increasing per
centage of the work time and energy of miners was ‘lost’ in getting to
and from their workplaces.
While the problems of deep mining had been largely resolved for
metal mining by the mid-nineteenth century, and workings were going
down well over 1,000 feet, for coal the pursuit of seams at depth created
increasing dangers from gas and ground instability. This did not prohibit
deep development in coal mines – some pits in Yorkshire, for example,
matched the deepest Cornish mines with depths of well over 1,000 feet by
the1830s – but it was less common. Thus, in very general terms, the coal
and iron mining industries, which were able to exploit widely distributed
mineral reserves, tended to opt for lateral development, while the more
geographically restricted non-ferrous industry tried to expand production
by exploiting lodes at ever greater depths. In the early 1850s, for exam-
ple, there were over 2,000 collieries operating in England and Wales while
the number oftinandcopper mines amounted to no more than a few
hundred. Similarly, the production of some non-ferrous mining districts
tended to be dominated by the output of a small number of particularly
large producers, employing large numbers of men, women and children.
In 1853, for example, more than 50 per cent of Cornwall’s copper output
came from just 10 per cent of its active mines (Mineral Statistics 1853).
The data in Table 15.7 show that, as early as 1837, the proportion of
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