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.
Economists and historians are still debating the causes of the Great Depression. While we know what happened, we have only theories to explain the reason for the economic collapse. This overview will arm you with knowledge of the political events that may have helped cause the Great Depression.he crash wiped out 40 percent of the paper value of common stock. Although this was a cataclysmic blow, most scholars do not believe that the stock market crash, alone, was sufficient to have caused the Great Depression. In 1929, there were 25,568 banks in the United States; by 1933, there were only 14,771.