Note
This text uses UTF-8 (Unicode) file encoding. If the apostrophes and quotation marks in this paragraph appear as garbage, you may have an incompatible browser or unavailable fonts. First, make sure that your browser’s “character set” or “file encoding” is set to Unicode (UTF-8). You may also need to change the default font.
Figure numbers—both in the body text and in captions—have been made into links only when the figure is not directly above or below the paragraph that discusses it. Some figures are mentioned more than once.