Göttingen Collection of Mathematical Models and Instruments

Case number 9

Infinitesimal neighbourhood of a line congruence Infinitesimal neighbourhood of a line congruence Infinitesimal neighbourhood of a line congruence Cone of third order
Cone of third order Cone of third order The tangent surfaces belonging to models 163-170 The tangent surfaces belonging to models 163-170
The tangent surfaces belonging to models 163-170 Cone of third order The tangent surfaces belonging to models 163-170
Cinematic surfaces of 4. order Cinematic surfaces of 4. order Cinematic surfaces of 4. order
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