Illustrations of the Huttonian Theory of the EarthPlayfair, John
Science
Illustrations of the Huttonian Theory of the Earth
Playfair, John
Geology; Hutton, James, 1726-1797. Theory of the earth
424. The same hurry and impatience are visible in the manner in which
his argument against Dr Hutton is usually conducted. He has seldom been
careful to make himself master of the opinions of his adversary; and
what he gives as such, and directs his reasonings against, have often
no resemblance to them whatsoever. Without any intention to deceive
others, but deceived himself, he usually begins with misrepresenting Dr
Hutton's notions, and then proceeds to the refutation of them. In this
imaginary contest, it will readily be supposed, that he is in general
successful: when a man has the framing both of his own argument, and
that of his antagonist, he must be a very unskilful logician if he does
not come off with the advantage.
425. It is but justice, however, to the Neptunists, to acknowledge,
that they are not all liable to the censure of beginning their
researches from a period antecedent to the existence of the laws of
nature. This absurdity does not, so far as I know, infect the system of
Werner. That mineralogist has not proposed to explain the first origin
of things, though he has supposed, at some former period, a condition
of the globe very unlike the present, viz. the entire submersion of the
solid under the fluid part.
NOTE XXIV. § 129.
_System of_ BUFFON.
426. The affinity of Dr Hutton's theory to that of Buffon, is nothing
more than what arises from their making use of the same agents, viz.
fire and water, in producing the present condition of the earth's
surface. In almost all other respects the two theories are extremely
different. The order in which those agents are employed in them, is
directly opposite, as has already been remarked; Buffon introducing the
action of fire first, and of water only in the second place, to waste
and destroy mineral bodies, and afterwards to dispose them anew, and
arrange them into strata. He makes no provision for the consolidation
of these strata, nor any for their angular elevation; he has no means
of explaining the unstratified rocks; nor any, but one extremely
imperfect, for explaining the inequalities of the earth's surface.
Again, Buffon mistook, in some degree, the true object of a theory of
the earth; and though he did not go back, like the geologists just
named, to a time when the laws of nature were not fully established,
he begins from a condition of things too unlike the present to be the
basis of any rational speculation. He does not, indeed, undertake to
examine the state of our planetary system before the sun existed; for
from such extravagance, even when most disposed to indulge his fancy,
he would surely have revolted. But he treats of the world, when the
earth and the planets had just ceased to be a part of the sun, and were
newly detached from the body of that luminary.[231]
[Footnote 231: According to Buffon, the granite is the true solar
matter, unchanged but by its congelation.]
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