Underscores "_" before and after a word or phrase indicate _italics_ in the original text. Equal signs "=" before and after a word or phrase indicate =bold= in the original text. Small capitals have been converted to SOLID capitals. Illustrations have been moved so they do not break up paragraphs. Typographical errors have been silently corrected but other variations in spelling and punctuation remain unaltered. Footnotes are all journal references, so they have been moved to the end of the text. In the original text, the volume number for the journals was double underlined for emphasis. In this book this has been replaced with the use of italics. Thesis …
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