know anything, a part of the then living matter has had the form of
polypes, competent to separate from the water of the sea the carbonate
of lime necessary for their own skeletons. Grain by grain, and
particle by particle, they have built up vast masses of rock, the
thickness of which is measured by hundreds of feet, and their area by
thousands of square miles. The slow oscillations of the crust of the
earth, producing great changes in the distribution of land and water,
have often obliged the living matter of the coral-builders to shift
the locality of its operations; and, by variation and adaptation to
these modifications of condition, its forms have as often changed. The
work it has done in the past is, for the most part, swept away, but
fragments remain; and, if there were no other evidence, suffice to
prove the general constancy of the operations of Nature in this world,
through periods of almost inconceivable duration.




VII.

ON THE METHODS AND RESULTS OF ETHNOLOGY.


Ethonology is the science which determines the distinctive characters
of the persistent modifications of mankind; which ascertains the
distribution of those modifications in present and past times, and
seeks to discover the causes, or conditions of existence, both of
the modifications and of their distribution. I say "persistent"
modifications, because, unless incidentally, ethnology has nothing to
do with chance and transitory peculiarities of human structure. And