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John Napier's method of multiplication and logarithms, and how Charles Babbage corrected his calculations.
(Part 6 of 7)
Playlist Link - http://www.youtube.com/playlist?list=PL18FC35BAE7676C38
Transcript link - http://media-podcast.open.ac.uk/feeds/mst121-sundials/transcript/mst121.02_track_7_00518_6461.pdf
For more information about John Napier's mathematical creations visit http://www3.open.ac.uk/study/undergraduate/course/mst121.htm