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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.
Archibald Napier was 16 years old when John Napier was born. [3] Merchiston Castle from an 1834 woodcut. There are no records of Napier's early learning, but many believe that he was privately tutored during early childhood. At age 13, he was enrolled in St Salvator's College, St Andrews. Near the time of his matriculation the quality of the ...
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.
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.
Scottish mathematician John Napier publishes Mirifici Logarithmorum Canonis Descriptio ("Description of the Admirable Table of Logarithms"), outlining his discovery of logarithms and incorporating the decimal mark. Astronomer Johannes Kepler soon begins to employ logarithms in his description of the Solar System.
John Napier is best known as the discoverer of logarithms. He also invented the so-called "Napier's bones" and made common the use of the decimal point in arithmetic and mathematics. Napier's birthplace, Merchiston Tower in Edinburgh, is now part of the facilities of Edinburgh Napier University. There is a memorial to him at St Cuthbert's at ...
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 ...