What is the consequence? that man, working for the future, is not exactly aware beforehand what value the future will attach to his labour. Value incorporated in a material object will be higher or lower, according as it renders more or less service, or, to express it more clearly, human labour, which is the source of value, receives according to circumstances a higher or lower remuneration. Such eventualities are an exercise for foresight, and foresight also has a right to remuneration. But what connexion is there, I would ask, between these fluctuations of value, between these variations in the recompense of labour, and that marvellous natural industry, those admirable physical laws, which without our participation have brought the water of the ocean to the spring? Because the value of this barrel of water varies according to circumstances, are we to conclude that nature charges sometimes more, sometimes less, sometimes nothing at all, for evaporation, for carrying the clouds from the ocean to the mountains, for freezing, melting, and the whole of that admirable industry which supplies the spring? [p284] It is exactly the same thing in the case of agricultural products. The value of the soil, or rather of the capital applied to the soil, is made up not of one element but of two. It depends not only on the labour which has been employed, but also on the ability which society possesses to remunerate that labour—on Demand as well as on Supply. Take the case of a field. Not a year passes, perhaps, in which there is not some labour bestowed upon it, the effects of which are permanent, and of course an increase of value is the result. Roads of access, besides, are improved and made more direct, the security of person and property becomes more complete, markets are extended, population increases in number and in wealth—different systems of culture are introduced, and a new career is opened to intelligence and skill; the effect of this change of medium, of this general prosperity, being to confer additional value on both the present and the anterior labour, and consequently on the field.