The text of this e-book has mostly been preserved in its original form, but a number of typographic errors have been corrected silently – they are listed at the end of the book. Missing or inconsistent punctuation has been corrected silently in a few places, but inconsistent hyphenation has not been altered. An index item that lacked a page reference has been remedied, and an archaic symbol representing the mathematical ‘factorial’ function has been replaced by the standard exclamation mark (!). Footnotes have been numbered and positioned below the relevant paragraphs. The marker for footnote 31 was missing from the original text and has been arbitrarily placed at the end of the relevant par…
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