Volume1 Introductory--Equlibrium and the theretical norm of economic quantities--How the economic system generates evolution--The contours of economic evolution--Time series and their normal--Historical outlines Volume2 The price level--Physical quantities, employment, Prices and quantiities of individual commodities--Expenditure, wages, customeers--The rate of interest--The central market and stock exchange--1919-1929--The world crisis and after--