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.
Southern California's largest gold rush followed the discovery of rich placer deposits by William F. Holcomb and Ben Choteau on May 4, 1860. Miners rushed to the valley and established boom towns. Belleville, the largest, rivaled San Bernardino in population and almost became the county seat.