Napier's bones is a manually operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients...

Laird of Merchiston. John Napier is best known as the discoverer of logarithms. He also invented the so-called "Napier's bones" and made common the use...

already popularly used and known as Napier's bones, was a set of rods inscribed with the multiplication table. Napier coined the word rabdology (from Greek...

mathematician John Napier and described in his book Rabdologiae in which he also described Napier's bones. It is an extension of Napier's Bones, using two sets...

advances were made until John Napier devised his numbering rods, or Napier's Bones, in 1617. Various forms of the Bones appeared, some approaching the...

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...

calculating rods known as Napier's bones (Scotland, 1617) and Genaille–Lucas rulers (France, late 1800s). Genaille–Lucas rulers Napier's bones Williams, Michael...

multi-digit numbers. To this end an ingenious arrangement of rotatable Napier's bones were mounted on it. It even had an additional "memory register" to record...

setting out his theory of elliptic orbits. Napier's Bones, a multiplication device invented by John Napier (who dies on April 4), is described in his...

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...