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 and Population Boom In 1858 Visalia was added to John Butterfield's Overland Stage route from St. Louis to San Francisco. A plaque commemorating the location can be found at 116 East Main Street.