Discussion
This statesman, scholar and inventor, an early President of the United States, invented the swivel chair, the spherical sundial, the mouldboard plough and the cipher wheel. Who was he?
Answer: D
He was Thomas Jefferson.
The third President invented a swivel chair, on which he is said to have drafted the Declaration of Independence, a spherical sundial, an improved mouldboard plough and a wheel cipher. He never patented anything, holding that ideas should be free.
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