In the 1950s, Allais worked in three related fields of physics:
•He invented a gparaconicalh pendulum and observed the precession of its azimuth during a number of marathon observational runs;
•He repeated some of the long-term optical sighting experiments of Esclangon (1926);
•He re-analyzed the interferometric observations of C. Dayton Miller from the 1920s.
•These researches all showed anomalous effects
•(And, over the same period, Allais also wrote two groundbreaking books on economic theory, for which he received the Nobel Prize in 1988)