The Greenpoint Monitor Museum John Ericsson Junior High School January 31, 2006 John Ericsson convinced Abraham Lincoln to let him build an ironclad ship to help save the Union. He invented the USS Monitor which has a turret with two cannons. The turret turns allowing the cannons to shoot in any direction without turning the ship.

The Greenpoint Monitor Museum John Ericsson Junior High School January 31, 2006

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John Ericsson convinced Abraham Lincoln to let him build an ironclad ship to help save the Union. He invented the USS Monitor which has a turret with two cannons. The turret turns allowing the cannons to shoot in any direction without turning the ship.

6 of 25