[2] The term _final_ utility is used with much the same significance as specific importance. It is the utility of the last and least important part of the supply, and the use of the term requires us to think of the supply as offered to users unit by unit till the whole amount is in their hands. The first unit, when it stands alone, is more important than any later one will be. The second is of less consequence, and the last is the least important of all. When, however, all have been supplied and are together available for use, one is as important as another. Each one has an effective utility which is measured by the service rendered by the last one. The term _specific_ indicates that we measure the importance of the supply of an article not in its entirety, but bit by bit, while the term _effective_ is the antithesis of _absolute_ and means that each bit of the supply not only renders an absolute service, but renders one which would not be gratuitously rendered by some other part of the supply in case this portion were removed or destroyed. We do not here think of the supply as built up from nothing to its present size bit by bit, but look at it as it stands and measure the importance of any particular quantity. When we speak of final utility, we think of a series of "increments" supplied one after another, and in this case the successive increments become less and less important, since, after some have been supplied, the want of the kind of good that they represent is less keenly felt. The conception of the series of units is merely a means of isolating one unit from a total number and obtaining a mental measurement of its importance which corresponds with the effective importance of any unit in the entire quantity. _Land an Original Form of Wealth._--Land is the original gift of nature to humanity, and wherever there are people enough to make the possession of a particular piece of it important, it becomes a form of wealth. It can be valueless only when population is very sparse; and then an increase in the number of people dwelling on it gives to it early the attribute of specific importance. The land that is accessible to a growing population cannot long be superabundant. _Forms of Wealth produced by Labor._--Few useful goods are presented to man by nature in a finished state, and it is therefore necessary for man to exert himself in order to get the goods that he needs in the condition in which he can use them. He must make raw substances more useful than they naturally are, and as he does this the things become partly products of his labor. Of course the supply of them is limited, since labor is so.