First published in 1869.
Second Edition, with an additional preface, 1892.
Third corrected proof of the first electronic edition, 2000.
Based on the text of the second edition.
The page numbering and layout of the second edition have been preserved,
as far as possible, to simplify cross-referencing.
This is a corrected proof. Although it has been checked against the print
edition, expect minor errors introduced by conversion and transcription.
This document forms part of the archive of Galton material available at
Original electronic conversion by Michal Kulczycki, based on a facsimile
prepared by Gavan Tredoux.
This edition was edited, cross-checked and reformatted by Gavan Tredoux.