Napier's Bones Simulation vs. Virtual Slide Rule Utilizzo e statistiche
John Napier's contribution to mathematics was truly significant. Born in Scotland, Napier studied as a mathematician, physicist and astronomer.
He is best known as the inventor of logarithms, but he also invented one of the first computing devices. The device, known as Napier's Bones, is manually operated and can be used to find the products and quotients of numbers.
Napier's device was based on Arab mathematics and used the lattice method of multiplication. Each of the rods are inscribed with the multiplication tables for a specific number. By arranging the rods on the board, the product of two numbers can be found by performing addition operations.
Use the Napier's Bones app to learn how one of the earliest calculating devices worked. More than 400 years ago, people used Napier's Bones to find the product of large numbers. In using this simulation you will discover a new way to multiply. Have fun!
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Virtual Slide Rule is a fully functional mathematical tool. Heavily used before the invention of the pocket calculator. These are hard to find these days, but we have a small collection (including a few unopened pocket rules and one eight-foot educational version that used to hang on the wall in the front of a high school chemistry or physics class). Virtual Slide Rule comes complete with instructions.
Just the thing to geek-out your iPad.
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Napier's Bones Simulation VS. 
Virtual Slide Rulegennaio 1, 2025