CORRIGENDA

On page 411, in line 4, for $$\overline{S}$$ī $$\overline{P}$$ read $$\overline{S}$$ i $$\overline{P}$$⁠; in line 6, for Some $$\overline{S}$$ is $$\overline{P}$$⁠, read Some $$\overline{S}$$ is P, and for some S is not P read some $$\overline{S}$$ is not $$\overline{P}$$⁠; and in line 7, for $$\overline{S}$$ ī $$\overline{P}$$ read $$\overline{S}$$ i $$\overline{P}$$⁠. In the sixth line from the bottom of page 414, for $$\overline{S}$$ a P read $$\overline{S}$$ a $$\overline{P}$$⁠.