The Greenpoint Monitor Museum "Road Show" P.S. 31 Samuel F. Dupont School March 24, 2006 John Ericsson's USS Monitor was made of metal and it had a steam engine. It did not need the wind.

The Greenpoint Monitor Museum "Road Show" P.S. 31 Samuel F. Dupont School March 24, 2006

John Ericsson's USS Monitor was made of metal and it had a steam engine. It did not need the wind.

John Ericsson's USS Monitor was made of metal and it had a steam engine. It did not need the wind.

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