_The Difference between Capital Goods and Capital Summarized._--The distinction between capital goods, on the one hand, and capital, on the other, is, then, like that between particular tissues and a living body, or like that between particular particles of water in the river and the river that flows forever. We can single out and watch certain drops of the water as they flow from a spring, and we can trace them through their brief careers, and say truly that the river is composed of fickle and transient stuff; but we cannot say that the river is transient. That is perpetuated by the renewing of the supply of water as the original drops disappear. We can mentally watch a particular man, as he enters the social force of workmen, labors for a time, and drops out of the line, and can see that society is composed of transient material; but society itself is an abiding thing. So we can study a particular bit of ore or wool or leather or a particular hammer or spindle or sewing machine, and in those cases we shall be studying capital goods and finding how perishable they are; but we shall also see that a stock of them always abides as the capital of economic society. We can cease to look at individual things and study the permanent fund of productive wealth, which is made up of goods like ore, wool, leather, hammers, spindles, and sewing machines. The identity of the things which make up this stock is forever changing. The same list of things we shall never find in the stock on any two dates, but a supply of similar things forever abides. _Capital is this permanent fund of productive goods, the identity of whose component elements is forever changing. Capital goods are the shifting component parts of this permanent aggregate._ They are the particular instruments that, each during its own brief economic lifetime, take their places in the endless procession of things which in its entirety is an abiding productive agent--the co-worker of labor and its perpetual assistant in creating consumers' wealth. _The Business Man's View of Capital._--It is as such an abiding entity that a business man regards capital. He describes it nearly always as a sum of money. Thus the capital of a manufacturer is "a million dollars" because a stock of instruments worth that amount is kept intact in his possession. It is not allowed to waste away, however much the constituent parts of it may shift. The waste and renewal which business entails leave the equivalent of the million dollars always on hand, though never in the literal shape of money. A stock of shifting goods always worth a million dollars is, by a figure of speech, described as a million dollars "invested in the goods."[2]