3 janv. 1829 - First Snagboat invented.
Description:
These boats patrolled the rivers and removed snags so other boats would not hit them and sink. A snag is a sunken tree, stump, or boat wreck that could cause damage to a ship if hit.
http://www.usace.army.mil/About/History/Historical-Vignettes/Civil-Engineering/120-Snagboats/
Ajouté au bande de temps:
Market Revolution 1815-1860
Mr. M and Mrs. Borno extra credit. pd 9
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