Cummins ISB and QSB Engine Parts. Based on the Cummins B Series, the ISB engine was launched in 1998 and is available in 4 and 6 inline cylinder models. Design innovations include a 24-valve setup and the Interact electronic engine management system, both contributing to increased fuel efficiency and meeting emission regulations.
From 1920 to 1929, stocks more than quadrupled in value â not because of fundamentals such as corporate production and profits, but rather fueled by rampant speculation. The economic house of cards came to a screeching halt on Black Tuesday, October 29, 1929 when the bubble burst.
These problems contributed to the crisis that began the Great Depression. America's Great Depression began with the dramatic crash of the stock market on Black Thursday, October 24, 1929 when 16 million shares of stock were quickly sold by panicking investors who had lost faith in the American economy.age income for workers who were lucky enough to have kept their jobs fell almost 43% between 1929 and 1933. It was the worst economic disaster in American history. Farm prices fell so drastically that many farmers lost their homes and land.