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There is a certain direction in which, viewing the stone, when the light falls with a proper obliquity, we see a luminous reflection from the internal parts of the stone. This arises from the reflecting surfaces of the sparry structure or minute cracks, all turned in one direction, consequently, giving that luminous appearance only in one point of view.
'But the very consciousness that there are any other persons existing besides ourselves is to me painful. Every one who even thinks of you seems to rob me of a part of your being. Besides, I am weary of pomp and palaces. I should like to live in a sparry grot, and sleep upon a couch of sweet leaves!
When this solution is exposed to the action of the atmosphere, the acid gas, by means of which the stony substance is dissolved, evaporates from the solution, in having a stronger attraction for the atmospheric air; it is then that the marble, or calcareous substance, concretes and crystallises, separating from the water in a sparry state, and forming a very solid stone by the successive accretion from the solution, as it comes to be exposed to the influence of the atmosphere in flowing over the accumulating body.
Not only are those sparry and pyritous substances, which are more natural to coal strata, found forming veins traversing those strata in various directions, but also every other mineral vein may occasionally be found pervading coal mines, or traversing bituminous strata. Gold, silver, copper, lead, calamine, have all, in this manner, been found in coal.
ARAM. If the witch Hope forbids us to be wise, Yet when I turn to these Woe's only friends, And with their weird and eloquent voices calm The stir and Babel of the world within, I can but dream that my vex'd years at last Shall find the quiet of a hermit's cell: And, neighbouring not this hacked and jaded world, Beneath the lambent eyes of the loved stars, And, with the hollow rocks and sparry caves, The tides, and all the many-music'd winds
A body whose external form has been modified by this process is called a CRYSTAL; one whose internal arrangement of parts is determined by it is said to be of a SPARRY STRUCTURE, and this is known from its fracture.
"There are, in all the regions of the earth, huge masses of calcareous matter in that crystalline form or sparry state in which, perhaps, no vestige can be found of any organized body, nor any indication that such calcareous matter has belonged to animals; but as in other masses this sparry structure or crystalline state is evidently assumed by the marine calcareous substances in operations which are natural to the globe, and which are necessary to the consolidation of the strata, it does not appear that the sparry masses in which no figured body is formed have been originally different from other masses, which, being only crystallized in part, and in part still retaining their original form, have ample evidence of their marine origin.
This rock may indeed be considered, in some respects, as a porphyry; for it has an evident ground, which is feld-spar, in its sparry state; and it is, in one view, distinctly maculated with quartz, which is transparent, but somewhat dark-coloured . Considered as a porphyry, this specimen is no less singular than as a granite.
No human imagination can conceive, or words suffice to describe, the glorious radiance which, shot fiercely forth by the flame, was returned from so many hundred thousand points of reflection, afforded by the sparry pillars and their numerous angular crystals.
A body, whose external form has been modified by this process, is called a crystal; one whose internal arrangement of parts is determined by it, is said to be of a sparry structure; and this is known from its fracture.
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