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.
George Washington
Alexander Hamilton
John Adams
Thomas Jefferson
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:   3 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:   8 years ago
Very nice question.

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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