enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Napier's bones - Wikipedia

    en.wikipedia.org/wiki/Napier's_bones

    Napier's bones is a manually operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers. The method was based on lattice multiplication , and also called rabdology , a word invented by Napier.

  3. Promptuary - Wikipedia

    en.wikipedia.org/wiki/Promptuary

    The promptuary, also known as the card abacus is a calculating machine invented by the 16th-century Scottish mathematician John Napier and described in his book Rabdologiae [1] in which he also described Napier's bones. It is an extension of Napier's Bones, using two sets of rods to achieve multi-digit multiplication without the need to write ...

  4. John Napier - Wikipedia

    en.wikipedia.org/wiki/John_Napier

    He also invented the so-called "Napier's bones" and made common the use of the decimal point in arithmetic and mathematics. Napier's birthplace, Merchiston Tower in Edinburgh, is now part of the facilities of Edinburgh Napier University. There is a memorial to him at St Cuthbert's at the west side of Edinburgh. [2]

  5. Genaille–Lucas rulers - Wikipedia

    en.wikipedia.org/wiki/Genaille–Lucas_rulers

    Genaille–Lucas rulers (also known as Genaille's rods) are an arithmetic tool invented by Henri Genaille, a French railway engineer, in 1891. The device is a variant of Napier's bones . By representing the carry graphically, the user can read off the results of simple multiplication problems directly, with no intermediate mental calculations .

  6. Organum Mathematicum - Wikipedia

    en.wikipedia.org/wiki/Organum_Mathematicum

    Kircher adopted some of the ideas in the Organum from preexisting inventions like Napier's bones, almanacs, and his own Arca Musarithmica. Like other calculating devices of the period, the Organum prefigures modern computing technology. Yet, due to its general lack of adoption, it remains an interesting but obscure footnote in the history of ...

  7. FACT CHECK: No, Joe Biden Did Not Wander Into The Amazon ...

    www.aol.com/fact-check-no-joe-biden-163830511.html

    A post with over 275,000 views on X claims that President Joe Biden “wandered” into the Amazon rainforest immediately after giving a speech. Verdict: Misleading He walked down a path he was ...

  8. George W. Bush - Wikipedia

    en.wikipedia.org/wiki/George_W._Bush

    George W. Bush with his parents, Barbara and George H. W. Bush, c. 1947. George Walker Bush was born on July 6, 1946, at Grace-New Haven Hospital in New Haven, Connecticut. [1] He was the first child of George Herbert Walker Bush and Barbara Pierce. He was raised in Midland and Houston, Texas with four siblings: Jeb, Neil, Marvin and Dorothy.

  9. List of members of the Sons of the American Revolution

    en.wikipedia.org/wiki/List_of_members_of_the...

    George H. W. Bush [3] 41st George W. Bush [ 3 ] 43rd Of the presidents who lived since the SAR's founding in 1889 and are not listed above, presidents Grover Cleveland , Richard Nixon , Bill Clinton , Barack Obama , and Joe Biden all had patriot ancestors but did not join the SAR. [ 4 ]