Transcriber’s notes:

The text of this e-book has been preserved in its original form apart from correction of a few typographic errors (omposition → composition, recal → recall, gives → give, bloodvessels → blood vessels), and insertion of some missing quotation marks. Inconsistent hyphenation and inconsistent spelling (Scheld/Scheldt/Sheldt) has not been altered. Hyperlinks (to pages and footnotes) are underlined and show coloured highlighting when the mouse pointer hovers over them. Page numbers are shown in the right margin and footnotes are located at the end. Footnotes are located at the end.

The cover image of the book was created by the transcriber and is placed in the public domain.