Rabdologiæ, seu Numerationis per virgulas libri duo
by John Napier, Andro Hart, George Chalmers
CalculatorsEarly works to 1800ArithmeticEarly works to 1900
Writing a summary for young readers…
For young readers
Book data: Open Library
by John Napier, Andro Hart, George Chalmers
Book data: Open Library