Note
It was not possible to always reproduce the flow of text around the many figures and illustrations. These will appear in approximately the same arrangement. Occasionally, numbered full page illustrations appeared out of order in the original.
On p. 164, the composite illustration includes Figures 312 through 322, and resists any attempt to reproduce the individual components. It appears as a single image, with the original captions included in the image itself.
The numbered figures 520, 521 and 522 appear in the text out of sequence, though all references to them are correct. The sequence has been retained here.