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Some of the larger concretions consist of a mere spherical shell, filled with slightly consolidated ashes. The concretions contain a small proportion of carbonate of lime: a fragment placed under the blowpipe decrepitates, then whitens and fuses into a blebby enamel, but does not become caustic.
The world possesses as yet in its regard only the superficial forms that appear in revery, it has no hidden machinery, no third dimension in which unobserved and perpetual operations are going on. Its only terms, in a word, are concretions in discourse, ideas combined in their æsthetic and logical harmonies, not in their habitual and efficacious conjunctions.
This earthy mass is of a pale reddish colour, like the less pure varieties of Pampean mud in Banda Oriental; it includes small calcareous concretions, like those of tosca- rock but more arenaceous, and other concretions of a greenish, indurated argillaceous substance: a few pebbles, also, from the underlying gravel-bed are also included in it, and these being occasionally arranged in horizontal lines, show that the mass is of sub-aqueous origin.
But the most puzzling thing about the place is, that out of the mud comes up not jumbies, but a multitude of small stones, like no stones in the neighbourhood; we found concretions of iron sand, and scales which seemed to have peeled off them; and pebbles, quartzose, or jasper, or like in appearance to flint; but all evidently long rolled on a sea-beach. Messrs.
Blaxland's establishment, bore that peculiar, undulating character which appears in the southern districts, where it closely resembles furrows, and is termed ploughed ground. This appearance usually indicates a good soil, which is either of a red or very dark colour, and in which small portions of trap-rock, but more frequently concretions of indurated marl, are found.
Living in an age of rhetoric, with an education that dealt with nothing but ideal entities, verbal, moral, or mathematical, Plato saw in concretions in discourse the true elements of being. Definable meanings, being the terms of thought, must also, he fancied, be the constituents of reality.
I have those small cavities, in this rock, from the island of Arran, containing crystal, felt-spar, and mica, all crystallised in the same cavity . But this is nothing to the druzen or crystalline concretions, which are found in a similar manner among metallic and mineral substances in the veins and mines; there, every species of mineral and metallic substance, with every variety of mixture and composition, are found both concreted and crystallised together in every imaginable shape and situation.
But he had had an eczema on the back of his neck, and now concretions were forming in his ears, which pointed, it was feared, to decay of the bones of the skull. When she saw how pale he looked, with his spoiled blood and his flabby flesh all out in yellow patches, she would become serious, but her principal feeling would be one of astonishment.
At eighty miles from the coast, in a cliff thus composed, there were a few layers of ferruginous sandstone, and of an argillaceous sandstone with concretions of marl like those in the Pampas. The strata generally dipped at an angle of 45 degrees towards the cliff from which they had slided. I have observed in slips, both on a small and large scale, that this inward dip is very general.
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