Invention | Portraits in Revolution

	Orrery, c. 1771 by David Rittenhouse (1732—96) Special Collections Center, University of Pennsylvania Libraries, Philadelphia, PA. This mechanical model of the solar… » view »
	The Turtle, 1775 by David Bushnell (1740—1824/26) Wood and iron. New York Historical Society, New York, NY. Connecticut inventor David Bushnell created the first… » view »
	Section of Water Pipe, c. 1797—1804 New York, NY Cedar. New-York Historical Society, New York, NY. This section of a wooden pipe was used by the Manhattan… » view »
	Polygraph, 1806 by John Isaac Hawkins (1772—1855); Charles Willson Peale (1741—1827) Mahogany, brass, green baize; 25.4 x 61.3 x 43.2 (10 x 24 1/8 x 17 in.) Monticello, VA. Jefferson used a series… » view »
	Design for Mold Board Plow, n.d. by Thomas Jefferson (1743—1826) Design by Thomas Jefferson, Library of Congress, Washington, DC. Jefferson fashioned his first wooden moldboard plow (… » view »
	Armonica by Benjamin Franklin (1706—1790) Franklin Court, Underground Musuem, Philadelphia, PA. In 1761 Benjamin Franklin invented his Armonica, which… » view »
	Lightning Rod by Benjamin Franklin (1706—1790) The Franklin Institute, Philadelphia, PA. Top portion of a lightning rod, designed by Benjamin Franklin. » view »