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Webster 1913 Edition
Napier's rods
{
. Na′pi-er’s bonesˊ
,Na′pi-er’s rodsˊ
}A set of rods, made of bone or other material, each divided into nine spaces, and containing the numbers of a column of the multiplication table; – a contrivance of
Baron Napier
, the inventor of logarithms, for facilitating the operations of multiplication and division.