# What is the function of Napier rods?

Calculation of products and quotients of numbersNapier’s bones / Purpose

Table of Contents

## What is the function of Napier rods?

Calculation of products and quotients of numbersNapier’s bones / Purpose

## Who invented calculating device called Napier bones 1614?

scholar John Napier

In 1614, Edinburgh-born Renaissance scholar John Napier invented logarithms. A means of simplifying complex calculations, they remain one of the most important advances in the study and practical application of mathematics.

**How do you calculate Napiers Bones?**

We can use Napier’s bones to multiply any two numbers. E.g. For 75 × 3, place the multiplier, the ‘7’ and the ‘5’ bone side by side (for 75) as shown below. To use the above Napier’s bones to calculate 3 × 75, sum the numbers along the slanted diagonals of the combined bones using the row applying to the multiplier.

### What are the components of napiers bone?

Napier’s bones are three dimensional, square in cross section, with four different rods engraved on each one. A set of such bones might be enclosed in a convenient carrying case. A rod’s surface comprises 9 squares, and each square, except for the top one, comprises two halves divided by a diagonal line.

### How is Abacus different from Napier’s rods?

Explanation: Not only does the abacus have uses for many different cultures but it also has uses for the blind such as performing addition, subtraction, division, multiplication, square root, cubic root. -Napier’s bones was invented to help you with multiplication.

**What are the advantages of Napier’s bones?**

Advantages of Napier’s bone: It is a Practical calculating device and performed manually. It is simplified and increase the speed of doing multiplication. Reduced the risk of error in large multiplication. Cost efficient than earlier designs.

#### When did the abacus stop being used?

The introduction of the Hindu-Arabic notation, with its place value and zero, gradually replaced the abacus, though it was still widely used in Europe as late as the 17th century. The abacus survives today in the Middle East, China, and Japan, but it has been largely replaced by electronic calculators.

#### What is Napier bone computer?

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.

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

Disadvantages of Napier’s bone: It became tedious when the multiplication has to be done with big numbers. It was a much elaborate setup. It was made up of 200 rods placed in a special box.

## What is Napier method?

Credit: Ken Welsh/Bridgeman. Portrait of Scottish mathematician, John Napier (1550 – 1617) This method uses a grid to multiply numbers. Multiplying a two-digit number with another two-digit number would require a by grid, for example 43 × 26 . Multiplying 264 × 53 would require a by grid.

## 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.