Geometrical Conoids String Surface Model

Made:
1872 in Paris and France
maker:
Fabre de Lagrange
Geometrical Conoids String Surface Model

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String surface model, conoids, cylinder and cone

Model showing four surfaces: a cylinder, cone and two conoids. This is one of a large set of ruled surface models made by Fabre de Lagrange in Paris, France, following designs introduced in the early 19th century. They illustrate surfaces which can be traced out in space by the movement of a straight line.

Details

Category:
Mathematics
Object Number:
1872-114
Materials:
brass (copper, zinc alloy), lead (metal) and cotton (fibre)
type:
string surface model
credit:
Fabre de Lagrange