Transcriber’s Notes
Reading edition
Silently corrected a handful of palpable typos.
Moved footnotes to a section immediately preceding the Index, and added an entry for it to the Contents.
Slightly reformatted tables to better fit dynamic flow on narrow screens.
Conjecturally restored one missing subtopic (“Coal, importance of”) in the Index.
In the text versions, delimited text in italics by _underscores_.
In the text versions, included filenames of illustrations, for more convenient reference (by another program).