Let me ask the reader to bear in mind, what has already been sufficiently illustrated, that the possession or production of any form of wealth is virtually the possession or production of any other form of wealth for which it will exchange—in order that he may clearly see that it is not merely improvements which effect a saving in labor directly applied to land that tend to increase rent, but all improvements that in any way save labor. That the labor of any individual is applied exclusively to the production of one form of wealth is solely the result of the division of labor. The object of labor on the part of any individual is not the obtainment of wealth in one particular form, but the obtainment of wealth in all the forms that consort with his desires. And, hence, an improvement which effects a saving in the labor required to produce one of the things desired, is, in effect, an increase in the power of producing all the other things. If it take half a man’s labor to keep him in food, and the other half to provide him clothing and shelter, an improvement which would increase his power of producing food would also increase his power of providing clothing and shelter. If his desires for more or better food, and for more or better clothing and shelter, were equal, an improvement in one department of labor would be precisely equivalent to a like improvement in the other. If the improvement consisted in a doubling of the power of his labor in producing food, he would give one-third less labor to the production of food, and one-third more to the providing of clothing and shelter. If the improvement doubled his power to provide clothing and shelter he would give one-third less labor to the production of these things, and one-third more to the production of food. In either case, the result would be the same—he would be enabled with the same labor to get one-third more in quantity or quality of all the things he desired. And, so, where production is carried on by the division of labor between individuals, an increase in the power of producing one of the things sought by production in the aggregate adds to the power of obtaining others, and will increase the production of the others, to an extent determined by the proportion which the saving of labor bears to the total amount of labor expended, and by the relative strength of desires. I am unable to think of any form of wealth, the demand for which would not be increased by a saving in the labor required to produce the others. Hearses and coffins have been selected as examples of things for which the demand is little likely to increase; but this is true only as to quantity. That increased power of supply would lead to a demand for more expensive hearses and coffins, no one can doubt who has noticed how strong is the desire to show regard for the dead by costly funerals.