Max and Lotte knew and socialized with the physicist Lise Meitner and the chemist Otto Hahn since the 1920s .
Volmer married the physical chemist Lotte Pusch .
Max and Lotte Pusch knew and socialized with the physicist Lise Meitner and the chemist Otto Hahn since the 1920s .
Volmer married the physical chemist Lotte Pusch .