Case number 53

Four models with unknown meaning Four models with unknown meaning Four models with unknown meaning Four models with unknown meaning
Periodic heat conduction in a stick Rotation of prismatic bars Rotation of prismatic bars Surface
Path of a heavy point on the sphere (spherical pendulum) Curvature of prismatic bars Heat conduction in a stick; double source Rotation of prismatic bars
Rotation of prismatic bars Heat conduction in a stick; single source Catenary on a sphere Rotation of prismatic bars
Rotation of prismatic bars Calculating machine Mercedes-Euklid Mod.I Calculating machine Brunsviga Calculating machine Triumphator

The corresponding bottom case is: Case number U 53

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