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 spark that ignited the gold rush occurred in May 1848 when Sam Brannan, a storekeeper in Sutter's Creek, brandished a bottle filled with gold dust around San Francisco shouting 'Gold! Gold! Gold from American River!' The residents of the city now had proof of the discovery and the stampede to the gold fields was on.