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Orrery, c. 1771 Special Collections Center, University of Pennsylvania Libraries, Philadelphia, PA. This mechanical model of the solar… » view » |
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The Turtle, 1775 Wood and iron. New York Historical Society, New York, NY. Connecticut inventor David Bushnell created the first… » view » |
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Section of Water Pipe, c. 1797—1804 Cedar. New-York Historical Society, New York, NY. This section of a wooden pipe was used by the Manhattan… » view » |
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Polygraph, 1806 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 » |
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Design for Mold Board Plow, n.d. Design by Thomas Jefferson, Library of Congress, Washington, DC. Jefferson fashioned his first wooden moldboard plow (… » view » |
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Armonica Franklin Court, Underground Musuem, Philadelphia, PA. In 1761 Benjamin Franklin invented his Armonica, which… » view » |
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Lightning Rod The Franklin Institute, Philadelphia, PA. Top portion of a lightning rod, designed by Benjamin Franklin. » view » |