Untitled attachment
https://assets.merveilles.town/media_attachments/files/108/129/245/014/855/416/original/7859ffbd40a8af43.jpeg
@euhmeuh @clacke @neauoire
romans had portable ones like this, made of copper. i can’t find one with two, but they had counting tables upon which you could put as many stones as you wanted, based on older babylonian ones that simply had ten beads in each column. everything here was on the silk road so it’s a common tradition, with the japanese 1:4 configuration just being the final evolution
Chirp! is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.
All Chirp! content and data are available under the Creative Commons Attribution 3.0 license.