The valve is a simple variable-geometry device that controls the opening and closing of the specified flow window or valve curtain area as determined by the camshaft and rocker ratio. The valve curtain area is defined as the flow window created by the open valve at maximum valve lift.
CALIFORNIA LEGENDS The California Gold Rush In the cold morning hours of January 24, 1848, James Marshall, a construction foreman at Sutter s Mill, was inspecting the water flow through the mill s tail race.
The Gold Rush of 1849 was sparked with the discovery of gold in early 1848 in California's Sacramento Valley. Its effects cannot be overstated in shaping the history of the American West during the 19th century. Over the next years, thousands of gold miners travelled to California to 'strike it rich'.