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Civil War cannon - discussed on http://www.nps.gov/archive/cuga/longtom.htm I don't know how to create pages, but someone might find it fun Friendly Person (talk) 01:14, 4 August 2010 (UTC)
Gold mining
editThis is also a device used formerly in gold mining, consisting of a long (3-6 m) wooden trough with a perforated plate at the end. Soil is washed down, the plate performs a grading function. All the best: Rich Farmbrough 10:51, 4 October 2024 (UTC).