| | Amazon.com: Rabdology (Charles Babbage Institute Reprint): Books: John Napier,William F. Richardson (Site not responding. Last check: 2007-10-17) |
 | | Amazon.com: Rabdology (Charles Babbage Institute Reprint): Books: John Napier,William F. Richardson |
 | | 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. |
 | | This first English translation of Napier's Rabdologia provides a clear and readable introduction to a group of physical calculating devices, which, long overshadowed by Napier's logarithms, have their own intrinsic interest and charm. |
| amazon.com /Rabdology-Charles-Babbage-Institute-Reprint/dp/0262140462 (585 words) |