Page:Principles of Political Economy Vol 1.djvu/154

132 The desirable medium is one which mankind have not often known how to hit: when they labour, to do it with all their might, and especially with all their mind; but to devote to labour, for mere pecuniary gain, fewer hours in the day, fewer days in the year, and fewer years of life.

§ 4. The third element which determines the productiveness of the labour of a community, is the skill and knowledge therein existing; whether it be the skill and knowledge of the labourers themselves, or of those who direct their labour. No illustration is requisite to show how the efficacy of industry is promoted by the manual dexterity of those who perform mere routine processes; by the intelligence of those engaged in operations in which the mind has a considerable part; and by the amount of knowledge of natural powers and of the properties of objects, which is turned to the purposes of industry. That the productiveness of the labour of a people is limited by their knowledge of the arts of life, is self-evident; and that any progress in those arts, any improved application of the objects or powers of nature to industrial uses, enables the same quantity and intensity of labour to raise a greater produce.

One principal department of these improvements consists in the invention and use of tools and machinery. The manner in which these serve to increase production and to economize labour, needs not be specially detailed in a work like the present: it will be found explained and exemplified, in a manner at once scientific and popular, in Mr. Babbage's well-known "Economy of Machinery and Manufactures." An entire chapter of Mr. Babbage's book is composed of instances of the efficacy of machinery in "exerting forces too great for human power, and executing operations too delicate for human touch." But to find examples of work which could not be performed at all by unassisted labour, we need not go so far. Without pumps, worked by steam-engines or otherwise, the water which collects in mines could not in