Napier Crookenden was born on August 31, 1915, in Cheshire, England, UK.
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By using The Napier's rule
Sir George Napier
Napier's bones, used for calculating products and quotients of numbers was also called Rabdology. Napier first published his method in 1617.
John Napier was famous for his work with logarithms.
logarithmic device called as napier bones