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John Napier is best known as the discoverer of logarithms. He also invented ... Archibald Napier was 16 years old when John Napier was born. ... World. 2 vols. U*X*L ...
The slide rule was invented around 1620–1630, shortly after John Napier's publication of the concept of the logarithm. Edmund Gunter of Oxford developed a calculating device with a single logarithmic scale; with additional measuring tools it could be used to multiply and divide.
John Napier (1550–1617), the inventor of logarithms Title page of Napier's 1614 table of logarithms of trigonometric functions Mirifici Logarithmorum Canonis Descriptio The 19 degree pages from Napier's 1614 table. The left hand page covers angle increments of 0 to 30 minutes, the right hand page 30 to 60 minutes
1614 — John Napier publishes a table of Napierian logarithms in Mirifici Logarithmorum Canonis Descriptio, 1617 — Henry Briggs discusses decimal logarithms in Logarithmorum Chilias Prima, 1618 — John Napier publishes the first references to e in a work on logarithms.
The method of logarithms was publicly propounded by John Napier in 1614, in a book titled Mirifici Logarithmorum Canonis Descriptio (Description of the Wonderful Canon of Logarithms). [ 19 ] [ 20 ] Prior to Napier's invention, there had been other techniques of similar scopes, such as the prosthaphaeresis or the use of tables of progressions ...
Merchiston Tower, also known as Merchiston Castle, was probably built by Alexander Napier, the 2nd Laird of Merchiston around 1454. It serves as the seat for Clan Napier.It was the home of John Napier, the 8th Laird of Merchiston and the inventor of logarithms, who was born there in 1550.
Cover page of Rabdologiæ. In 1617 a treatise in Latin titled Rabdologiæ and written by John Napier was published in Edinburgh. Printed three years after his treatise on the discovery of logarithms and in the same year as his death, it describes three devices to aid arithmetic calculations.
The term Napierian logarithm or Naperian logarithm, named after John Napier, is often used to mean the natural logarithm. Napier did not introduce this natural logarithmic function, although it is named after him. [1] [2] However, if it is taken to mean the "logarithms" as originally produced by Napier, it is a function given by (in terms of ...