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 California Gold Rush began at Sutter's Mill, near Coloma. On January 24, 1848, James W. Marshall, a foreman working for Sacramento pioneer John Sutter, found shiny metal in the tailrace of a lumber mill Marshall was building for Sutter on the American River.he effects of the Gold Rush were substantial. At first, loose gold and gold nuggets could be picked up off the ground, and since there was no law regarding property rights in the goldfields a system of staking claims was developed.