Introduction : the problem of the memory and its place
Part I : remembering additive logical structures
Remembering a simple serial configuration
Remembering an m-shaped serial configuration
Remembering equivalent numerical sets arranged in different rows
The remembrance of conflicting numerical and spatial correspondences
The remembrance of transitive relations
Remembering associative operations
Part II : remembering multiplicative logical structures
The remembrance of double serial correspondences
The remembrance of double classifications
The remembrance of class intersections
The remembrance of an arrangement
Part III : the remembrance of causal structures
Remembering a causal process represented by levers
The remembrance of a transmitted motion
Remembrance of an incomprehensible causal process
The remembrance and growing appreciation of a causal problem
Part IV : the remembrance of spatial structures
The remembrance of a geometrical transformation (rotation)
The remembrance of horizontal levels
Remembrance of three triangles of different shape and equal area
Remembrance of the positions and orientations of a moving body
Remembrance of contingent figural combinations with or without classification
The reconstruction of a geometrical configuration with partly regular and partly contingent elements