Models of rubric: Behavior of curves, surfaces, and line congruences on the infintely small scale Model 163 The types of the development of a space curve at a small scale Model 164 The types of the development of a space curve at a small scale Model 165 The types of the development of a space curve at a small scale Model 166 The types of the development of a space curve at a small scale Model 167 The types of the development of a space curve at a small scale Model 168 The types of the development of a space curve at a small scale Model 169 The types of the development of a space curve at a small scale Model 170 The types of the development of a space curve at a small scale Model 171 The tangent surfaces belonging to models 163-170 Model 172 The tangent surfaces belonging to models 163-170 Model 173 The tangent surfaces belonging to models 163-170 Model 174 The tangent surfaces belonging to models 163-170 Model 175 The tangent surfaces belonging to models 163-170 Model 176 The tangent surfaces belonging to models 163-170 Model 177 The tangent surfaces belonging to models 163-170 Model 178 The tangent surfaces belonging to models 163-170 Model 179 Normal curvature circle in an elliptic surface point Model 180 Normal curvature circle in a hyperbolic surface point Model 181 Normal curvature circle in a parabolic point Model 214 Two gypsum cylinders Model 215 To the permutability of the differentiation sequence Model 280 Infinitesimal neighbourhood of a line congruence Model 281 Infinitesimal neighbourhood of a line congruence Model 282 Infinitesimal neighbourhood of a line congruence Model 468 Peano surface