Conoid surface model
1872
Surface string model
1872
Hyperbolic paraboloid; a skew quadrilateral
1872
Staircase vault for a square wall
1872
Model to show two intersecting planes
1886-1888
Model showing a pair of cones enveloping a sphere and a plane
1886-1888
Surface string model, 1872.
1872
Deformation of a cylinder, surface string model
1872
Skew surface with its tangent paraboloid surface string model
1872
Hyperboloid surface string model
1872