|The rigging which held aloft the sails of 19th century sailing ships was made up of thousands of feet of rope.
Every of inch of it had to be twisted by hand, but not without help.
In this cross curricular lesson plan for Grades 3 - 5, learn the science behind rope making - a vital trade in any early American port town.
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Twisted Strands: Simple Machines and Rope Making at the Charlestown Navy Yard (PDF)