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Length/Distance | Convert from mark twain to chain [Ramsden, engineer] |
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Common Length Conversions Metric Length Conversions Unit Definition (mark twain) The mark twain or twain is an old word for the number two, derived from the Anglo-Saxon twegen. The American author Samuel Clemens (1835-1910), who had been a riverboat pilot on the Mississippi in his youth, took his literary name from a traditional riverboat phrase "mark twain", meaning "exactly two" fathoms of water. This was the minimum depth needed for the boats to operate safely without running aground. Unit Definition (chain [Ramsden, engineer]) The Ramsden chain is quite different to the Gunter chain. The Ramsden chain was commonly used by American surveyors. It equals approximately 100 feet and is also known as the engineer's chain.
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