The results of the 1959 Glasgow University investigation into British industrial profit, business saving, and investment are the subject of this book, originally published in 1965. Part 1 presents original estimates of profits in British industries 1920-1938, which when linked with Government estimates of such profits since 1948, permit long runs studies of the fortunes of individual industries. In addition, the appropriation of profit between dividends and business saving is also estimated for manufacturing industry 1920-1938. Part 2 begins the analysis of the extensive financial data collected in the Glasgow enquiry and is concerned with the effects of the size of a firm on its financial performance. The financial performance of large companies quoted on the Stock Exchange with a sample of small unquoted private companies and unincorporated firms is compared.