WikiVisually
Infinite photos and videos for every Wiki article · Find something interesting to watch in seconds
Great Cities Kings of France Celebrities Presidents World Banknotes Wars and Battles Wonders of Nature Countries of the World Famous Castles Richest US Counties Supercars Sports Orders and Medals British Monarchs Animals Ancient Marvels Crown Jewels Tallest Buildings History by Country Great Artists Largest Palaces Best Campuses Rare Coins Largest Empires Recovered Treasures Great Museums
more top lists
History
Napier's bones
Videos
Page
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. It was printed in Edinburgh and dedicated to his patron Alexander Seton.
A set of Napier's bones
A set of Napier's bones
An unusual 18th-century set of Napier's bones in which the numbers are on rotating cylinders rather than rods of square cross-section
An unusual 18th-century set of Napier's bones in which the numbers are on rotating cylinders rather than rods of square cross-section
John Napier
Videos
Page
John Napier of Merchiston, nicknamed Marvellous Merchiston, was a Scottish landowner known as a mathematician, physicist, and astronomer. He was the 8th Laird of Merchiston. His Latinized name was Ioannes Neper.
John Napier (1550–1617)
John Napier (1550–1617)
Statue of John Napier, Scottish National Portrait Gallery
Statue of John Napier, Scottish National Portrait Gallery
Merchiston Castle from an 1834 woodcut
Merchiston Castle from an 1834 woodcut
Memorial to John Napier in St Cuthbert's Church, Edinburgh
Memorial to John Napier in St Cuthbert's Church, Edinburgh