Thomas Jefferson's Sundial at Monticello

At Monticello, Thomas Jefferson had drawn and designed many structures from the house to the fences, roofs, and many special structures.  In the house he had a special book holder made that rotated and held at least 4 books at once to read. He had a special clock made that was near his bed that he designed. Outside, Jefferson had this spherical sundial/clock. It was very unique and I really liked the base with corn carved into the stone.