brought up from infancy at the expense of much labour to some person or persons, and if this labour, or part of it, had not been bestowed, the child would never have attained the age and strength which enable him to become a labourer in his turn. To the community at large, the labour and expense of rearing its infant population forms a part of the outlay which is a condition of production, and is to be replaced with increase from the future produce of their labour. By the individual, this labour and expense are usually incurred from other motives than to obtain such ultimate return, and, for most purposes of political economy, need not be taken into account as expenses of production. But the technical or industrial education of the community; the labour employed in learning and in teaching the arts of production, in acquiring and communicating skill in those arts; this labour is really, and in general solely, undergone for the sake of the greater or more valuable produce thereby attained, and in order that a remuneration, equivalent or more than equivalent, may be reaped by the learner, besides an adequate remuneration for the labour of the teacher, when a teacher has been employed.

As the labour which confers productive powers, whether of hand or of head, may be looked upon as part of the labour by which society accomplishes its productive operations, or in other words, as part of what the produce costs to society, so too may the labour employed in keeping up productive powers; in preventing them from being destroyed or weakened by accident or disease. The labour of a physician or surgeon, when made use of by persons engaged in industry, must be regarded in the economy of society as a sacrifice incurred, to preserve from perishing by death or infirmity that portion of the productive resources of society which is fixed in the lives and bodily or mental powers of its productive members. To the individuals, indeed, this forms but a part, sometimes an imperceptible part, of the motives that induce them to submit to medical treatment: it is not prin

cipally from economical motives that persons have a limb amputated, or endeavour to be cured of a fever, although when they do so there is generally sufficient inducement for it even on that score alone. This is therefore one of the cases of labour and outlay which, though conducive to production, yet not being incurred for that end, or for the sake of the returns arising from it, are out of the sphere of most of the general propositions which political economy has occasion to assert respecting productive labour: though, when society and not the individuals are considered, this labour and outlay must be regarded as part of the advance by which society effects its productive operations, and for which it is indemnified by the produce.

§ 8. Another kind of labour, usually classed as mental, but conducing to the ultimate product as directly, though not so immediately, as manual labour itself, is the labour of the inventors of industrial processes. I say, usually classed as mental, because in reality it is not exclusively so. All human exertion is compounded of some mental and some bodily elements. The stupidest hodman who repeats from day to day the mechanical act of climbing a ladder, performs a function partly intellectual; the most intelligent dog or elephant probably could not be taught to do it: the dullest human being, instructed beforehand, is capable of turning a mill; but a horse cannot turn it without somebody to guide and watch him. On the other hand, there is some bodily ingredient in the labour most purely mental, when it generates any external result. Newton could not have produced the Principia without the bodily exertion either of penmanship or of dictation; and he must have drawn many figures, and written out many calculations and demonstrations, while he was preparing it in his mind. Inventors, besides the labour of their brains, generally go through much labour with their hands, in the models which they construct and the experiments they have to make before their idea can realize itself successfully in act.

Whether mental, however, or bodily, their labour is a part of that by which the production is brought about. The labour of Watt in contriving the steam-engine was as essential a part of production as that of the mechanics who build or the engineers who work the instrument; and was undergone, no less than theirs, in the prospect of a remuneration from the produce. The labour of invention is often estimated and paid on the very same plan as that of execution. Many manufacturers of ornamental goods have inventors in their employment, who receive wages or salaries for designing patterns, exactly as others do for copying them. All this is strictly part of the labour of production; as the labour of the author of a book is equally a part of its production with that of the printer and binder.

In a national, or universal point of view, the labour of the savant, or speculative thinker, is as much a part of production in the very narrowest sense, as that of the inventor of a practical art; many such inventions having been the direct consequences of theoretic discoveries, and every extension of knowledge of the powers of nature being fruitful of applications to the purposes of outward life. The electromagnetic telegraph was the wonderful and most unexpected consequence of the experiments of Ersted and the mathematical investigations of Ampère: and the modern art of navigation is an unforeseen emanation from the purely speculative and apparently merely curious enquiry, by the mathematicians of Alexandria, into the properties of three curves formed by the intersection of a plane surface and a cone. No limit can be set to the importance, even in a purely productive and material point of view, of mere thought. Inasmuch however as these material fruits, though the result, are seldom the direct purpose of the pursuits of savants, nor is their remuneration in general derived from the increased production which may be caused incidentally, and mostly after a long interval, by their discoveries; this ultimate influence does not, for most of the purposes of political economy,

require to be taken into consideration; and speculative thinkers are generally classed as the producers only of the books, or other useable or saleable articles, which directly emanate from them. But when (as in political economy one should always be prepared to do) we shift our point of view, and consider not individual acts, and the motives by which they are determined, but national and universal results, intellectual speculation must be looked upon as a most influential part of the productive labour of society, and the portion of its resources employed in carrying on and in remunerating such labour, as a highly productive part of its expenditure.

§ 9. In the foregoing survey of the modes of employing labour in furtherance of production, I have made little use of the popular distinction of industry into agricultural, manufacturing, and commercial. For in truth this division fulfils very badly the purposes of a classification. Many great branches of productive industry find no place in it, or not without much straining; for example (not to speak of hunters or fishers) the miner, the road-maker, and the sailor. The limit, too, between agricultural and manufacturing industry cannot be precisely drawn. The miller, for instance, and the baker-are they to be reckoned among agriculturists or among manufacturers? Their occupation is in its nature manufacturing; the food has finally parted company with the soil before it is handed over to them: this however might be said with equal truth of the thresher, the winnower, the makers of butter and cheese; operations always counted as agricultural, probably because it is the custom for them to be performed by persons resident on the farm, and under the same superintendance as tillage. For many purposes all these persons, the miller and baker inclusive, must be placed in the same class with ploughmen and reapers. They are all concerned in producing food, and depend for their remuneration on the food produced; where the one class abounds and flourishes, the others do so too; they form collectively the

"agricultural interest;" they render but one service to the community by their united labours, and are paid from one common source. Even the tillers of the soil, again, when the produce is not food but the materials of what are commonly termed manufactures, belong in many respects to the same division in the economy of society as manufacturers. The cotton planter of Carolina, and the wool grower of Australia, have more interests in common with the spinner and weaver than with the corn grower. But on the other hand, the industry which operates immediately upon the soil has, as we shall see hereafter, some properties on which many important consequences depend, and which distinguish it from all the subsequent stages of production, whether carried on by the same person or not; from the industry of the thresher and winnower as much as from that of the cotton spinner. When I speak therefore of agricultural labour, I shall generally mean this, and this exclusively, unless the contrary is either stated or implied in the context. The term manufacturing is too vague to be of much use when precision is required, and when I employ it I wish to be understood as intending to speak popularly rather than scientifically.