Napier's bones, brass, eleven pieces, in gold stamped leather case, with a short manuscript description in the case
Napier's bones in brass, 17th century. John Napier (1550-1617), inventor of logarithms, also created this popular calculating tool known as Napier's cylindrical 'rods' or 'bones'. Napier's rods reduced muliplication to a sequence of simple additions and could also be used for division and to calculate square roots. This example dates from the 17th century and consists of ten brass square section rods in a gold stamped leather case with short manuscript details, in Italian, for using the rods.
- Object Number:
overall (closed): 75 mm x 75 mm x 45 mm, .39 kg
- napier's bones
- Fulgence, Mons. (Paris)
- Permanent collection
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.