TRANSCRIBER’S NOTE
The [Contents] are placed after the [Preface].
The figures have been placed between paragraphs, after they are mentioned in the text. This may result in a figure appearing to be in a different page than it was originally in in the printed book. The same applies to the single footnote of this book.
Two publisher’s advertisement pages were placed at the beginning of the book in the printed book, in this version they have been moved to [the end], with the other advertisement pages.
Changes to the original publication have been marked with a dotted underline, and the printed text usually appears in a frame when hovering the cursor on it.