A Single Asymmetrical Conic Section.
1568 – 1691
A Single Hollow Cone.
1568-1691
A Single Hollow Cone.
1568-1691
Five plumber's cones, for shaping lead sheet
Cone with stand R.A. 320
Cone with stand R.A. 320
A Single Hollow Cone.
1568-1691
A Single Hollow Cone.
1568-1691
A Single Hollow Cone.
1568-1691
A Single Hollow Conic Section.
1568-1691
A Single Hollow Cone.
1568-1691
Small black plastic cone
Cone with stand R.A. 320
Two brass truncated cones with two circular glass plates
1761
Six Hollow Cones and One Conic Section.
1568-1691