On the Origin of Species by Means of Natural Selection
Charles Darwin — sixth edition, 1872

The introduction and fifteen chapters, each as its own PDF, with the glossary
and the complete plain text as an appendix. Every file has a permanent address
of the form thesis.persist.click/chapters/04-natural-selection-or-the-survival-of-the-fittest.pdf
that can be cited and will not move.

The text is in the public domain. It was transcribed by Project Gutenberg
(eBook #2009, credits Sue Asscher and David Widger) and typeset here in
Liberation Serif and Instrument Serif.

  https://www.gutenberg.org/ebooks/2009