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.
[â¦] the 1906 earthquake and fire. The California Gold Rush came up when a guest wasnât related to James Marshall, whose gold discovery in the American River started the [â¦] Reply January 24, 1848: A Gleam in the Gravel | Friends of the California State Archives says: