Footnotes have been relabeled 1–43 and moved from within paragraphs to nearby locations between paragraphs.

Illustrations have been moved from within paragraphs to nearby locations between paragraphs. Therefore, the page numbers shown in the List of Woodcuts are sometimes wrong.

Original printed page numbers are shown in the right margin like this: {52}.

I produced the cover image and hereby assign it to the public domain.

On page [176] and elsewhere there are phrases such as ‹rarely exceed 1‐700th›, in which the fraction appears to have been printed with a hyphen. In other places, e.g. page [19], there are fractions such as ‹1/110th›, in which the ‹1› was printed over a vinculum, over ‹110›, in small text, and this fraction was followed by ‹th› in regular sized text. Herein, both forms have been converted to a form like this: ‹1‐30,000th›, using the Unicode character [u+2010 hyphen].