Flashbacks.

The article presents developments in the U.S. business sector and world economy between 1920 and 1980. One is about paper currency in Germany which stood at 26.7 billion marks at the end of the First World War. Another reports on progress in construction of the Hudson River bridge from New York to New Jersey. Another one highlights the decline of both prices and volume on the U.S. mutual fund exchanges in July 1965.