CA-HISTORY-HYDRAULIC-MINING-L Archives: June 2001
Hi Hydraulic Mining GroupBuy (or request that your library buy) Powell Greenland's book!1904 topo maps economic geology maps of the Sierra NevadaImages of all US Patents are available on the Web - an example: the pelton wheelRe: CA-HISTORY-HYDRAULIC-MINING-D Digest V01 #20