Transcriber's Note:

The following corrections were made:

Irregularities in hyphenation (e.g. supernormal vs. super-normal) and misquotations have not been corrected. Unless it was found that the error also occurred in the cited text, misspellings have been corrected.

Although Footnote 81 (originally on p. 104) refers to a "note at the end of this chapter," the "NOTE TO PAGE 104" begins on p. 110, several pages before the chapter ends. This has not been changed.

Footnotes markers have been changed from symbols (in the original) to numerals.

The format of chapter headings has been standardized.