# What is napier bones?

Asked by: Isla Wilkinson  |  Last update: 18 June 2021
Score: 4.1/5 (45 votes)

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. Napier published his version in 1617.

Also, What is the use of Napier bones?

Napier's bones, also called Napier's rods, are numbered rods which can be used to perform multiplication of any number by a number 2-9.

Just so, Why is it called Napier's bones?. These slips are written on the surface of ten rods, later on called Napier's rods (the best sets of Napier's numbering rods were made of ivory, so that they looked like bones, which explains why they are now known as Napier's bones).

Beside the above, Who invented Napier's bone and why?

The Scot, John Napier, invented these strips (originally made from bone) about 400 years ago to help calculate multiplication and division.

When was Napier invented?

John Napier, the inventor of logarithms, also invented this aid to calculation known as 'Napier's Bones' in 1617. The 'bones' consist of a set of rectangular rods, each marked with a counting number at the top, and the multiples of that number down their lengths.

44 related questions found

### Who use Napier bones?

Napier's bones became a very popular device for calculating in England and western Europe, because most people lacked these mathematical skills. The set is composed of ten bones, nine of which display the multiples of a given number between one and nine.

### How many strips are in Napier bones?

Project 1.1 Napier's Bones (or Rods)

To make Napier's rods (or bones), you need ten strips of paper each divided into 9 parts, one for each of the first 9 multiples of the number at the top of strip as shown below.

### When was the bones discovered?

Discovery. The bones were discovered by the anthropologist Georges Vacher de Lapouge in the Bronze Age cemetery of Castelnau-le-Lez, France during the winter of 1890. His findings were published in the journal La Nature, Vol. 18, 1890 Issue 888.

### What are the shortcomings of the Napier bones?

Limitations of Napier's bone:

It became slow when the multiplication has to be done with large amount of numbers. It was a extremely elaborate setup. It has 200 rods located in a special box.

### When were Napier's rods most widely used?

Napier's invention was employed extensively by people whose work depended on calculations and numbers, such as accountants, bookkeepers etc. The value of Napier's rods is exemplified by the fact that they were still being used in primary schools in Britain in the mid-1960s to assist in teaching multiplication.

### Who named the bones of the body?

So the Greek scholars, and later Roman and medieval scholars, named bones and organs and muscles after what they looked like. The thick bone at the front of your lower leg, the tibia, is named after a similar-looking flute.