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.
The causes of the Great Depression in the early 20th Century are a matter of active debate among economists, and are part of the larger debate about economic crisis, although the common belief is that the Great Depression was triggered by the 1929 crash of the stock market.he recession of 1937â38, which slowed down economic recovery from the great depression, is explained by fears of the population that the moderate tightening of the monetary and fiscal policy in 1937 would be first steps to a restoration of the pre March 1933 policy regime.