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He claims that they may be productive of fistula in ano, superficial ulcerations, fecal concretions, fissure in ano, and that they may hypertrophy and set up tenesmus and other troubles. The presence of human tails has given rise to discussion between friends and opponents of the Darwinian theory.
They are not unfrequently covered with barnacles, showing that they were not formed as concretions in the stratum where they now lie buried, but had been previously consolidated. The phosphatic nodules often collect fossil crabs and fishes from the London Clay, together with the teeth of gigantic sharks.
His idea was that all these things were mere concretions "generated by fermentation in the spots where they were found," as he very quaintly and even absurdly put it. The accusation, however, is not that Fallopius made a mistake as many another man has done but that he deliberately expressed an opinion which he did not hold and did so from religious motives.
Raspberries or strawberries eaten plentifully have been found to dissolve these concretions, and contribute to the preservation of the teeth and gums. Tooth powders and tinctures also have their use. A very convenient powder may be made of charcoal pounded in a mortar, and sifted fine.
By refining concretions in discourse it has attained to mathematics, logic, and the dialectical developments of ethics; by tracing concretions in existence it has reached the various natural and historical sciences. Following ancient usage, I shall take the liberty of calling the whole group of sciences which elaborates ideas dialectic, and the whole group that describes existences physics.
In Late Minoan times part of this fine hall had been used as a shrine, and in it were found, along with the usual 'horns of consecration, three fetish idols, grotesque natural concretions of quasi-human type.
There is some fine-grained syenitic granite, orbicularly marked by ferruginous lines, and weathering into vertical, cylindrical holes, almost touching each other. In the gneiss, concretions of granular feldspar and others of garnets with mica occur.
It is altogether erroneous, therefore, to view an object's sensible qualities as abstractions from it, seeing they are its original and component elements; nor can the sensible qualities be viewed as generic notions arising by comparison of several concrete objects, seeing that these concretions would never have been made or thought to be permanent, did they not express observed variations and recurrences in the sensible qualities immediately perceived and already recognised in their recurrence.
Therefore, a general theory of petrification or consolidation of mineral bodies must explain this distinct fact, and not suffer it any longer to remain a lusus naturae. Let us now consider what it is that we have to explain, upon the supposition of those concretions being formed from a solution.
I have stated that both the reddish mud and the concretions of tosca-rock are often penetrated by minute, linear cavities, such as frequently may be observed in fresh-water calcareous deposits: were they produced by the burrowing of small worms?
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