Contents: T. Brown
About the Translation. S. Papert
Preface. With Cl. Monnier
J. Vauclair
Rotations and Circumductions. With D. Voelin-Liambey
I. Berthoud-Papandropoulou
The Composition of Two Cyclic Successions. With A. Moreau
The Rotation of Cubes. With I. Fluckiger
M. Fluckiger
Compositions and Conservation of Lengths. With E. Marti
E. Mayer
The Composition of Differences. With H. Kilcher
J.P. Bronckart
The Sections of a Parallelepiped and a Cube. With C. Bruhlhart
E. Marbach
Correspondences of Kinships. With A. Karmiloff-Smith
A Special Case of Inferential Symmetry: Reading a Road Map Upside Down. With A. Karmiloff-Smith
Conflicts Among Symmetries. With Cl. Voelin
E. Rappe-du-Cher
Correspondences and Causality. With F. Kubli
Equilibrium of Moments in a System of Coaxial Disks. With A. Blanchet
E. Ackermann-Vallad o
Comparison of Two Machines and Their Regulators. G. Henriques
Morphisms and Transformations in the Construction of Invariants. E. Ascher
The Theory of Categories and Genetic Epistemology. General Conclusions.
