usively
used in England for spinning warp).
1832 287,800,000 1832 Roberts' self-acting mule perfected.
1841 489,900,000 1841 Bullough's improved power-loom.
Ring spinning (largely used in U.S.A.,
recently introduced into Lancashire).

From this schedule it is evident that the history of this trade may be
divided with tolerable accuracy into four periods.

(1) The preparatory period of experimental inventions of Wyatt, Paul,
etc., to the year 1770.

(2) 1770 to 1792 (_circa_), the age of the great mechanical
inventions.

(3) 1792 to 1830, the application of steam power to manufacture and
improvements of the great inventions.

(4) 1830 onward, the effect of steam locomotion upon the industry
(1830, the opening of the Liverpool and Manchester railway).

If we measure the operation of these several industrial forces within
these several periods, as they are reflected on the growing size of
the cotton industry, we shall realise the accumulative character of
the great industrial movement, and form some approximately accurate
conception of the relative importance of the development of mechanical
inventions and of the new motor-power.

Sec. 7. The history of the cotton industry is in its main outlines also
the history of other textile industries. We do not possess the same
means of measuring statistically the growth of the woollen industries
in the period of revolution; but since, on the one hand, many of the
spinning and weaving inventions were speedily adapted into the woollen
from the cotton industry, while the application of steam to
manufacture and the effects of steam locomotion were shared by the
older manufacture, the growth of the trade in the main conforms to the
same divisions of time. The figures of imported wool are not so
valuable a register as in the case of cotton, because no account is
taken of home-produce, but the following statistics of foreign and
colonial wool imported into England serve to throw light upon the
growth of our woollen manufactures.

STATISTICS OF WOOL IMPORTED INTO ENGLAND.

lbs. lbs.
1766 1,926,000 | 1830 32,305,000
1771 1,829,000 | 1840 49,436,000
1780 323,000 | 1850 74,326,000
1790 2,582,000 | 1860 151,218,000
1800 8,609,000 | 1870 263,250,000
1810 10,914