Napier's bones

Of these devices, Napier's bones were the most popular and widely known.

During the 19th century, Napier's bones underwent a transformation to make them easier to read.

Napier's bones include an aid for the execution of this algorithm.

He was also the inventor of the so-called "Napier's bones".

The device is a variant of Napier's bones.

History of computers and computing: Napier's bones.

Morland created also a multiplying machines with interchangeable disks based on Napier's bones.

The first device, which by then was already popularly used and known as Napier's bones, was a set of rods inscribed with the multiplication table.

Undusting Napier's Bones.

Napier's bones were a calculating help introduced by the Scot John Napier in 1617 to assist lattice method calculations.

In 1891, Henri Genaille invented a variant of Napier's bones which became known as Genaille-Lucas rulers.

Napier's Bones, a multiplication device invented by John Napier, is described in his Rabdologiæ, published in Edinburgh.

The use of Napier's Bones in calculating instruments,Annals of the History of Computing, Band 5, Nr.

Arab lattice multiplication, used by Fibonacci, was made more convenient by his introduction of Napier's bones, a multiplication tool using a set of numbered rods.

George G. Joseph, "Crest of the Peacock' suggests that Napier read this book to create Napier's bones, or Napier's rods.

The book describes the method of multiplication using the rods called "Napier's bones," and its Latin dedication acknowledges the help of Seton as the "illustrious Scottish Maecenas."

He was enchanted, and he would have gone on for ever, if I had not mentioned Napier's bones, Gunter's scales - the applied mathematics of navigation - lunars - the necessary tables.

While producing the first logarithmic tables Napier needed to perform many multiplications, and it was at this point that he designed Napier's bones, an abacus-like device used for multiplication and division.

The same principle described by Matrakci Nasuh underlay the later development of the calculating rods known as Napier's bones (Scotland, 1617) and Genaille-Lucas rulers (France, late 1800s).

The machine could add and subtract six-digit numbers, and indicated an overflow of this capacity by ringing a bell; to add more complex calculations, a set of Napier's bones were mounted on it.

Salmon accumulated a large library, had two microscopes, a set of Napier's bones, and other mathematical instruments, some arrows and curiosities which he brought from the West Indies, and Dutch paintings.

According to Grillet, he was inspired by Blaise Pascal's work with calculating machines to combine the Pascaline with Napier's bones, and build a machine that could perform both addition and multiplication.

The promptuary was a calculating machine invented by the 16th-century Scottish mathematician John Napier and described in the second edition of his book Rabdologiae in which he also described Napier's bones.

Modern English translations of both Napier's books on logarithms, and their description can be found on the web, as well as a discussion of Napier's Bones (see below) and Promptuary (another early calculating device).

He wrote a number of books and pamphlets: a book on stoves, on making sundials, on using a "sector" or "proportional instrument" (a simple calculator), and on using "Napier's bones" (another calculator) - among other works.