1790 semi circumferenter.
Fullsize image: https://s3-us-west-1.amazonaws.com/h...1_fullsize.jpg
Fullsize image: https://s3-us-west-1.amazonaws.com/h...2_fullsize.jpg
More: https://en.wikipedia.org/wiki/Circumferentor
Previously:
17th century architect's compass - photo
1619 compass - photo
Hirtz compass for locating bullets in surgery - photo
Bookmarks