Telescope (micrometer), ca. 1780
 | ||
  Photo courtesy of Monticello/Thomas Jefferson Foundation, Inc. |
 |
Paris (Passy)
Alexis-Marie Rochon (Attributed) Iceland crystal, brass, leather, pressed board, paper, and textile; L. closed 14 in. (35.6 cm), L. open 19 in. (48.3 cm), Diam. 2 1/6 in. (5.5 cm) Monticello: The Home of Thomas Jefferson (Charlottesville, Va.), 1992-4-2a-c 
This micrometer was given to Franklin by the pioneering astronomer Alexis Rochon, inherited by Francis Hopkinson, and given by him to Thomas Jefferson. It can still be seen at Monticello.
|
 | ||
|