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. 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.he California Gold Rush is generally considered to have ended in 1858, when the New Mexican Gold Rush began. These hearty pioneers found the land unbelievably productive, and ultimately California's great wealth came not from its mines but from its farms. Kathy Weiser/Legends of America, updated June, 2015.