Discussion :: Inventions - Section 1 (Q.No.8)
|T.Kavitha said: (Aug 10, 2011)|
|But declaration of independence was done by benjamin franklin.|
|Lilu said: (Nov 19, 2015)|
|Where is central drug research?|
|Ziya Sulthana said: (Apr 28, 2016)|
|Very nice question.
I really had a good use of it and its a very useful for me. THANKS.
|Aftab said: (Jul 21, 2016)|
|Good useful question. Please provide more details related to the question.|
|Netra Vyas said: (Aug 10, 2016)|
|But the Cipher Disk was invented by the Italian architect and author Leon Battista Alberti.|
|Aishwarya said: (Dec 24, 2020)|
|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.|
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