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Who Invented And What They Are!!!!!!!! Napier's bones is an abacus created by John Napier for calculation of products and quotients of numbers that was based on Arab mathematics and lattice multiplication used by Fibonacci writing in the Liber Abaci. Also called Rabdology (from Greek word) . Napier published his version of rods in a work printed in Edinburgh, Scotland, at the end of 1617 entitled Rabdologiæ. Using the multiplication tables embedded in the rods, multiplication can be reduced to addition operations and division to subtractions. More advanced use of the rods can even extract square roots. The abacus consists of a board with a rim; the user places Napier's rods in the rim to conduct multiplication or division. The board's left edge is divided into 9 squares, holding the numbers 1 to 9. The Napier's rods consist of strips of wood, metal or heavy cardboard. 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. The first square of each rod holds a single-digit, and the other squares hold this number's double, triple, quadruple and so on until the last square contains nine times the number in the top square. The digits of each product are written one to each side of the diagonal; numbers less than 10 occupy the lower triangle, with a zero in the top half. A set consists of 9 rods corresponding to digits 1 to 9. The figure additionally shows the rod 0; although for obvious reasons it is not necessary for calculations.
Wiki User
∙ 15y ago
Wiki User
∙ 16y agoby John Napier in 1617
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Who invented the Napiers Rods or Bones?
John Napier
What is the reason why John Napier invented The Napiers bone?
Because he wanted a simple calculating device. (It's "bones" actually.)
What is the name of John Napiers Machine?
Napier's Bones. It was a type of abacus.
What is the electro mechanical counting device invented by john napeir?
napiers bone
What Did Sir Thomas Moreland Invent as an improvement of Napier's Bones?
He invented the insert device, which was stuffed into a hole drilled in Napiers bones, which allowed a metal plank to go in. Although it wasnt a great improvement, his science in the insert device helped to the creation of Condoms by his son Samuel.
Who introduced the calculator?
French Blaise Pascal invented the calculator. He did this to help his dad who was a tax adjuster. Then Gottfried Leibnitz improved on Pascal idea with a machine that would add, subtract, multiply, and divide. John Napierin invented the movable multiplication table engraved on a series of square section metal rods, called Napiers Bones.
What are the seven earliest devices?
napiers bone
When was orcale bones invented?
me
Year of napier's bones inventedyear of napier's bones invented?
John Napier invented the Napier`s bone in 1617
Was the treaty of waitangi destroyed in napiers 1931 earthquake?
I do not think so.
Who invented human bones?
god
Who invented healing broken bones?
GOD did
