Weiss, 1906) Magnets, hysteresis, Weiss domains and Bloch Walls. Pierre Weiss   Pierre-Ernest Weiss (1865-1940)  was born in Mulhouse, France.  He attended the Zürich Polytechnikum ( ETH ) graduating at the head of his class in 1887 with a degree in mechanical engineering  Then, Weiss was admitted to the  Ecole normale supérieure