# 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.

View full answerAlso, 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.