  In 1908 Henri Poincar\'e gave a series of 'forgotten lectures' on wireless
telegraphy in which he demonstrated the existence of a stable limit cycle in
the phase plane. In 1929 Aleksandr Andronov published a short note in the
Comptes Rendus in which he stated that there is a correspondence between the
periodic solution of self-oscillating systems and the concept of stable limit
cycles introduced by Poincar\'e. In this article Jean-Marc Ginoux describes
these two major contributions to the development of non-linear oscillation
theory and their reception in France.
