Thus, in examining geological and mineralogical theories, I am laid
under the disagreeable necessity of pointing out the errors of physical
principles which are assumed, the prejudices of theoretical opinions
which have been received, and the misconceived notions which
philosophers entertain with regard to the system of nature, in which may
be perceived no ineffectual operation, nor any destructive intention,
but the wise and benevolent purpose of preserving the present order of
this world. But, though thus misled with regard to the cause of things,
naturalists are every where making interesting observations in the
mineral kingdom, I shall therefore avail myself of that instructive
information, for the confirmation of my theory.
It may now be proper to consider what must be required, in order to have
a geological and mineral theory established upon scientific principles,
or on such grounds as must give conviction to those who will examine
the subject; for, unless we may clearly see that there are means for
attaining that desirable end, few philosophers will be persuaded to
pursue this branch of knowledge.
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