Capital, according to the employment that can be given it, may be divided into such as affects the production of material goods, and such as affects personal goods or useful relations. The former, under the name of productive capital, is, in recent politico-economical literature, usually opposed to capital in use.(279) Evidently any one of the two kinds of capital mentioned above, may be used for both purposes.(280) Indeed, the two classes are, in many respects, coincident. Thus, a livery-stable carriage or a circulating library is productive capital to its proprietor, and capital in use(281) (_Gebrauchskapital_) to the nation in general; although the circulating library from which an Arkwright obtains technic information, or the livery-stable vehicle which carries a Borsig to his counting-room, has certainly been used in the production of material goods. Almost all capital in use may be converted into productive capital, and hence, the former might be called quiescent capital, and the latter working capital.(282) One of the principal differences between productive capital and capital in use is, that the former, even when most judiciously employed, does not so immediately replace itself, as the latter, by its returns.(283) On the other hand, the real dividing line between capital in use, and objects consumed which are not capital, is, and it is in complete harmony with our definition of capital, that the latter are subject not only to a more speedy destruction and one which is always contemplated, while in the case of the former, its destruction is only the unintended reverse-side of its use.