In this transcription, italic text is denoted by *asterisks* and bold text by =equal signs=. Subscripts are indicated by _underscores_ (e.g. *a*_1 and *b*_1 in Fig.5 caption) and superscripts by ^ (e.g. *a*^1. in Fig. 9 caption). Page footnotes (renumbered in consecutive order) are now located immediately below the relevant paragraphs.…
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