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Serie XVI, Nr 1

Ellipsoid with three basic intersections and eighteen lines of curvature.


Mathematical description
The lines of curvature divide the ellipsoid into infinitely small squares. In the model, 18 of these lines are represented. A line of curvature is a curve on a surface whose tangents are always in the direction of principal curvature (i.e., the maximum and minimum of the normal curvature K at a given point of a surface).

Title model and translation
Ellipsoid mit drei Hauptschnitten und achtzehn Krümmungslinien.
Ellipsoid with three basic intersections and eighteen lines of curvature.

Text on Sticker and translation
missing sticker.

Designer
Prof. Dr. Edvard Rudolf Neovius
Helsingfors in 1888

Company
E.R Neovius

Original price
Mark 35 (for three models)

Dimension
16-14-9 cm

Material
Plaster

Literature
Schilling, M., Catalog mathematischer Modelle für den höheren mathematischen Unterricht, Leipzig: Verlag von Martin Schilling, 1911