Nature has established, and, as it will immediately be shown, for very wise and important purposes, a permanent and indelible distinction between the effect of civilization and opulence on the production of food, and on the preparation of manufactures. In the latter, the discoveries of science, the exertions of skill, the application of capital, the introduction of machinery, are all-powerful, and give the older and more advanced state an immediate and decisive advantage over the younger and the ruder. In the former, the very reverse takes place: the additions made to productive power are comparatively inconsiderable, even by the most important discoveries; and as this capital and industry have in the end a powerful effect, and always enable the power of raising food for the human race to keep far a-head of the wants of mankind; yet this effect takes place very slowly, and the annual addition that can be made to the produce of the earth by such means is by no means considerable. The introduction of thorough draining will probably increase the productive power of the soil in Great Britain a third: scientific discovery may perhaps add another third; but at least ten years must elapse in the most favourable view before these effects generally take place--ere the judicious and well-directed labours of our husbandmen have formed rivulets for the superfluous wet of our fields, or overspread the soil with the now wasted animal remains of our cities. But our manufactures can in a few years quadruple their produce. So vast is the power which the steam-engine has made to the powers of production in commercial industry, that it is susceptible to almost indefinite and immediate extension; and the great difficulty always felt is, not to get hands to keep pace with the demand of the consumers, but to get a demand to keep pace with the hands employed in the production. Manchester and Glasgow could, in a few years, furnish muslin and cotton goods for the whole world.