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.
In 1848, gold was discovered in California. Within two years, some quarter of a million gold seekers had arrived from almost every country in the world, stimulating California's economy and forming multicultural communities that still exist today. The last great gold rush took place in the Klondike in 1897.