Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Napier's_bones> ?p ?o. }
Showing items 1 to 47 of
47
with 100 items per page.
- Napier's_bones abstract "Napier's bones is a manually-operated calculating device created by John Napier of Merchiston for calculation of products and quotients of numbers. The method was based on Arab mathematics and the lattice multiplication used by Matrakci Nasuh in the Umdet-ul Hisab and Fibonacci's work in his Liber Abaci. The technique was also called Rabdology (from Greek ῥάβδoς [r(h)abdos], "rod" and -λογία [logia], "study"). Napier published his version in 1617 in Rabdologiæ, printed in Edinburgh, Scotland, dedicated to his patron Alexander Seton.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. Note that Napier's bones are not the same as logarithms, with which Napier's name is also associated.The complete device usually includes a base board with a rim; the user places Napier's rods inside 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, quintuple, 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 10 rods corresponding to digits 0 to 9. The rod 0, although it may look unnecessary, is needed for multipliers or multiplicands having 0 in them.".
- Napier's_bones thumbnail Bones_of_Napier_(board_and_rods).png?width=300.
- Napier's_bones wikiPageExternalLink Napier.shtml.
- Napier's_bones wikiPageExternalLink mechcal.htm.
- Napier's_bones wikiPageID "252176".
- Napier's_bones wikiPageRevisionID "606650076".
- Napier's_bones hasPhotoCollection Napier's_bones.
- Napier's_bones subject Category:Mathematical_tools.
- Napier's_bones subject Category:Mechanical_calculators.
- Napier's_bones subject Category:Multiplication.
- Napier's_bones subject Category:Scottish_inventions.
- Napier's_bones type Calculator109887034.
- Napier's_bones type CausalAgent100007347.
- Napier's_bones type Expert109617867.
- Napier's_bones type LivingThing100004258.
- Napier's_bones type MechanicalCalculators.
- Napier's_bones type Object100002684.
- Napier's_bones type Organism100004475.
- Napier's_bones type Person100007846.
- Napier's_bones type PhysicalEntity100001930.
- Napier's_bones type Whole100003553.
- Napier's_bones type YagoLegalActor.
- Napier's_bones type YagoLegalActorGeo.
- Napier's_bones comment "Napier's bones is a manually-operated calculating device created by John Napier of Merchiston for calculation of products and quotients of numbers. The method was based on Arab mathematics and the lattice multiplication used by Matrakci Nasuh in the Umdet-ul Hisab and Fibonacci's work in his Liber Abaci. The technique was also called Rabdology (from Greek ῥάβδoς [r(h)abdos], "rod" and -λογία [logia], "study").".
- Napier's_bones label "Bastoncini di Nepero".
- Napier's_bones label "Bâtons de Napier".
- Napier's_bones label "Kostki Napiera".
- Napier's_bones label "Napier's bones".
- Napier's_bones label "Napiersche Rechenstäbchen".
- Napier's_bones label "Ossos de Napier".
- Napier's_bones label "Ábaco neperiano".
- Napier's_bones label "ネイピアの骨".
- Napier's_bones label "納皮爾的骨頭".
- Napier's_bones sameAs Napiersche_Rechenstäbchen.
- Napier's_bones sameAs Ábaco_neperiano.
- Napier's_bones sameAs Bâtons_de_Napier.
- Napier's_bones sameAs Bastoncini_di_Nepero.
- Napier's_bones sameAs ネイピアの骨.
- Napier's_bones sameAs Kostki_Napiera.
- Napier's_bones sameAs Ossos_de_Napier.
- Napier's_bones sameAs m.01lf09.
- Napier's_bones sameAs Q1358538.
- Napier's_bones sameAs Q1358538.
- Napier's_bones sameAs Napier's_bones.
- Napier's_bones wasDerivedFrom Napier's_bones?oldid=606650076.
- Napier's_bones depiction Bones_of_Napier_(board_and_rods).png.
- Napier's_bones isPrimaryTopicOf Napier's_bones.