between the scientific and the emotional methods of regarding nature;
and it admirably illustrates the differences between well-grounded,
suggestive, hypotheses, and baseless speculations.

I have tried to tell the story so that it may be intelligible to the
ordinary reader.


M.M. PATTISON MUIR.
CAMBRIDGE, November 1902.


* * * * *


NOTE TO NEW EDITION.

A few small changes have been made. The last chapter has been
re-written and considerably enlarged.

M.M.P.M.
FARNHAM, September 1913.

* * * * *




CONTENTS.