HomeAboutLogin
       
       
         
             
    Invention of Napier's Bones  
Napier's bones are an abacus invented by John Napier for calculation of products and quotients of numbers. Also called Rabdologia. Napier published his invention of the rods in a work printed in Edinburgh at the end of 1617 also entitle...
 
       
         
          2020 © Timeline Index