Napier's bones
thingiverse
This is a set of [Napier's bones](https://en.wikipedia.org/wiki/Napier%27s_bones). They are used to perform hand calculations using a technique closely related to the lattice method. They were invented by John Napier in 1617.
Download Model from thingiverse
With this file you will be able to print Napier's bones with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Napier's bones.