Napier's bones or rods. These were made of bone or ivory, and were a form of rearrangeable multiplication table invented by John Napier (1550-1617). From Denis Diderot Encyclopedie, Paris, 1751-80.
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Creative#:
TOP27779938
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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No
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No
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