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Drawing DaVinci's lock gate design 1485.  

Did You Know?
Transporting goods and people by canal dates back to antiquity. The lock gates used on the C&O Canal were an adaptation of a design by Leonardo DaVinci in the late 1400's. Until the advent of the railroad, water travel was far superior to land travel.

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Last Updated: June 25, 2009 at 08:08 EST