Theoretical concept of physiocrats with political arithmetics were the early evolution of classical political economy. Political arithmetics, first formulated by philomath J. Collins (1625 - 1683) and Sir W. Petty (1628 - 1687), who gave the name, was a very small part in the general history of thought. Political arithmetics searched for the general relations of interdependence among some economic quantities and policy of wealth. J. M. Lang (1775 - 1819) who devoted his whole life to study and developed the system, macroeconomic model, for analysis of intersectoral flow of products, opened the new stage for political arithmetics. He renewed its former principles but in the time of existence of political economy and more complex elaboration of principles of economy. He is a founder odd macroeconomic intersectoral analysis, flow of funds analysis and also mathematical economics. His work is entirely unknown and in 1958 has been after a very long time first published the substance of his political arithmetics.
