By degrees, the knowledge necessary to these council officials, and which found no place in the lectures on law, were formed into a special body of doctrine. After such men as Morhof and Thomasius had prepared the way,(148) Frederick William I., himself a clever cameralist, and author of the masterly financial system of Prussia, took the important step of founding, at Halle and Frankfurt on the Oder, special chairs of economy and cameralistic science; which, considering the time, were very ably filled by Gasser and Dithmar. (1727.) There was thus formed in the German universities a distinct school of cameralists, which, through Jung, Rössig and Schmalz, reached to the nineteenth century. The term cameralistic science, the creature of chance, was used, it must be said, with very various limits to its meaning.(149) However, Political Economy in Germany developed out of the science of law and the cameralistic sciences, while in England and Italy it had its origin chiefly in the study of questions of finance and foreign commerce. Section XX. Private Economy. (Continued.) If we abstract from cameralistic science as it was understood in the last century, what it has in common with all economy,(150) and therefore with public economy, next that which belongs to the aggregate of governmental economy, there remains only a number of rules, such as those which govern the principal branches of private business, and which indicate how they are to be carried on with the greatest advantage to those who engage in them. Such are forest and rural economy, mining science, technology, including architecture, and all that concerns founderies, and commercial science. Now that the expression cameralistic science is altogether obsolete, the aggregate of these might be designated by the name private economy. Obviously, we should have here, neither a simple nor pure science, but only a compilation of natural-philosophical and economic lemmas. Thus, in agriculture, for instance, a knowledge of the different kinds of soil, of the tillage of land, of the different plants and animals etc., belongs to the domain of natural science; while all that relates to the cost of production, the employment of capital, the wages of labor, the exchange of products, net product and the price of land, are purely politico-economical. The political economists also require a knowledge of the natural side of the cameralistic sciences. Such a knowledge is indispensable to every detailed and living theory, and especially to the application of economic science to practice. The great difference lies in this, that the cameralist interests himself in the production of material goods for their own sake, while the political economist regards them only in their relations to national life.(151)