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 vast majority of men and women on the move to California during the Gold Rush, however, came from east of the Mississippi River. Many of them had already relocated once in their lifetimes to the old northwest, leaving for California from small farms in Illinois, Indiana, and Ohio.