It is these veins which we are to consider as,
in some measure, the continuation of that mineral region, which lies
necessarily out of all possible reach of our examination. It is,
therefore, peculiarly interesting to know the state in which things
are to be found in this place, which may be considered as intermediate
between the solid land, upon the one hand, and the unknown regions of
the earth, upon the other.
We are now to examine those mineral veins; and these may be considered,
first, in relation to their form, independent of their substance or
particular contents; and, secondly, in relation to the contained bodies,
independent of their form.
In examining consolidated strata, we remarked veins and cutters as a
proof of the means by which those bodies had been consolidated. In that
case, the formation of these veins is a regulated process, determined
by the degree of fusion, and the circumstances of condensation or
refrigeration. In respect of these, the mineral veins now to be examined
are anomalous. They are; but we know not why or how. We see the effect;
but, in that effect, we do not see the cause.
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