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.
CALIFORNIA GOLD RUSH 1848-1855. The great CALIFORNIA GOLD RUSH 1848-1855 is historically paramount to Native American Indian history in California  it was estimated that some 300,000 immigrants poured into California during this seven-year period effectively tripling California's population.