The historical background

1-7

The cultural background

8-17

The philosophical atmosphere in Vienna

18-37

Why the circle invited me

the theory of curves and dimension theory

38-53

Vignettes of the members of the circle in 1927

54-73

Reminiscences of the Wittgenstein family

74-82

Ludwig Wittgenstein's Austrian dictionary

83-88

Wittgenstein's Tractatus and the early circle

89-103

On the communication of metaphysical ideas

Wittgenstein's ontology

104-128

Wittgenstein, Brouwer, and the circle

129-139

Discussions in the circle 1927–30

140-142

Poland and the Vienna circle

143-157

The United States 1930–31

158-173

Discussions in the circle 1931–34

174-177

The circle on ethics

178-193

Moritz Schlick's final years

194-199

Memories of Kurt Gödel

200-236