In the Systematic Index, pages vii-viii, sub-family items were renumbered from 15. through 38., to correspond to the numbers used in the text of the book. Letters missing or mis-typeset were inserted, e.g. 'practica ly' to 'practically.' Footnotes were moved to the end of the section to which they pertain. Raised dots were replaced with decimal points in numeric notations. Prime marker for b' was added to Figure 20. Punctuation was standardized.
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