Some illustrations have been repositioned and some that originally overlapped each other are presented separately here. Missing corners were missing in the source.
Identifying names in some captions have been replaced by letter keys and corresponding explanations; when the original book used numeric keys, they have been retained.
Sidenotes appear approximately where they occurred in the source. Depending on the display device, they may be shown in boldface, slightly smaller than the main text, with a shaded background; and may appear at the left margin or mid-line.
Footnotes have been moved to the end of this eBook.
The Index only covers pages 1-192. In the original book, it appeared immediately after the Preface, but has been moved to the end of this eBook.
In the original book, the Errata section appeared immediately after the Index, and has been moved, with the Index, to the end of this eBook.
Index entry for “Press, the” refers to non-existent page 910. Changed here to ‘190’.
Table of Contents added by Transcriber.
Page [153], second illustration: plates numbered in original sequence.
Page [175]: some numbers in the Key are unclear in the original.