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John Napier

Titles by This Author

"The tasks which fill'd beginners with dismayThis little book has banish'd clear away."John Napier had already discovered and published an epoch­making treatise on logarithms when in 1617 he turned to "rabdology" or rod-reckoning as yet another means by which to confront the problem of simplifying the huge calculations involved in multiplication, division, and the extraction of roots.