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SCIENTIFIC MATERIALISM. 1 1 3

tience. It implies a resolution to suppress indignation if
the statement of the one-half should clash with our convic-
tions, and to repress equally undue elation if the half-state-
ment should happen to chime in with our views. It implies
a determination to wait calmly for the Statement of the
whole, before we pronounce judgment in the form of either
acquiescence or dissent.

This premised, and, I trust, accepted, let us enter upon
our task. There have been writers who affirmed that the
pyramids of Egypt Were the productions of Nature ; and in
his early youth Alexander von Humboldt wrote a learned
essay with the express object of refuting this notion. We
now regard the pyramids as the work of men’s hands, aided
probably by machinery of which no record remains. We
picture to ourselves the swarming workers toiling at those
vast erections, lifting the inert stones, and, guided by the
volition, the skill, and possibly at times by the Whip of the
architect, placing them in their proper positions. The
blocks in this case were moved and posited by a power
external to themselves, and the final form of the pyramid
expressed the thought of its human builder.

Let us pass from this illustration of constructive power
to another of a diiferent kind. When a solution of common
salt is slowly evaporated, the water which holds the salt
in solution diappears, but the salt itself remains behind. At
a certain stage of concentration the salt can no longer retain
the liquid form; its particles, or molecules, as they are
called, begin to deposit themselves as minute solids, so
minute, indeed, as to defy all microscopic power. As evapo-
ration continues solidification goes on, and we finally obtain,
through the clustering together of innumerable molecules,
a finite crystalline mass of a definite form. What is this
form ? It sometimes seems a mimicry of the architecture
of Egypt. We have little pyramids built by the salt,
terrace above terrace from base to apex, forming a series of

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