General Knowledge - Inventions - Discussion
Discussion Forum : Inventions - Section 1 (Q.No. 8)
8.
This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
Answer: Option
Explanation:
Thomas Jefferson (April 13, 1743 - July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).
Discussion:
6 comments Page 1 of 1.
Aishwarya said:
4 years ago
Thomas Jefferson created Jefferson disks in the 1790s. Jefferson called his invention the "wheel cypher. ' It had 36 wooden disks, each with 26 letters in random order ("jumbled and without order, ' according to Jefferson) along the edge, like the ridges of a coin. The device was used briefly and then forgotten. Cypher wheels were later independently invented. Jefferson's papers describing his "cypher' were rediscovered in 1922.
(1)
Netra Vyas said:
8 years ago
But the Cipher Disk was invented by the Italian architect and author Leon Battista Alberti.
Aftab said:
8 years ago
Good useful question. Please provide more details related to the question.
Ziya Sulthana said:
9 years ago
Very nice question.
I really had a good use of it and its a very useful for me. THANKS.
I really had a good use of it and its a very useful for me. THANKS.
Lilu said:
9 years ago
Where is central drug research?
T.kavitha said:
1 decade ago
But declaration of independence was done by benjamin franklin.
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