Socrates, [167].

Solipsism, [86].

Soncinas, [108] n.

Soto, D. De, [113] n.

Space, analysis of, [319] sqq.;

problems on, [321-2].

Specialists, scientific, and metaphysics, [27-28].

Species expressa, [46];

sensibilis, [313].

Spencer, [30], [213], [228], [229], [335].