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Reliance on external perception, constant appeals to concrete fact and physical sanctions, have always led the mass of reasonable men to magnify concretions in existence and belittle concretions in discourse. They are too clever, as they feel, to mistake words for things.
These beds include subordinate layers of greenish impure clay, soft micaceous and calcareous sandstones, and reddish friable earthy matter with white specks like decomposed crystals of feldspar; they include, also, hard concretions, fragments of shells, lignite, and silicified wood.
Where sponges and other silica-secreting organisms abound on limestone banks, silica forms part of the accumulated deposit, either in its original condition, as, for example, the spicules of sponges, or gathered into concretions and layers of flint.
Posterity will be puzzled what to do with busts like these, the concretions and petrifactions of a vain self-estimate; but will find, no doubt, that they serve to build into stone walls, or burn into quicklime, as well as if the marble had never been blocked into the guise of human heads. But it is an awful thing, indeed, this endless endurance, this almost indestructibility, of a marble bust!
In this instance our author had convinced himself that the calcedony concretions had not been formed, as he and other mineralists had before supposed, by means of infiltration; he has not, however, substituted any thing more intelligible in its stead. There is, however, a subject in which I can more freely accuse this author of being deceived.
Troubles and other realities took on themselves a metaphysical impalpability, sinking to mere mental phenomena for serene contemplation, and no longer stood as pressing concretions which chafed body and soul.
After deposition similar particles seem often to exert a mutual attraction on each other, and congregate together in particular spots, forming lumps, nodules, and concretions.
Clays and shales often contain concretions of lime carbonate, of iron carbonate, or of iron sulphide. Some fossil, such as a leaf or shell, frequently forms the nucleus around which the concretion grows. Why are building stones more easily worked when "green" than after their quarry water has dried out?
The convent the ancient female convent in particular, such as it still presents itself on the threshold of this century, in Italy, in Austria, in Spain is one of the most sombre concretions of the Middle Ages. The cloister, that cloister, is the point of intersection of horrors. The Catholic cloister, properly speaking, is wholly filled with the black radiance of death.
I will briefly describe my route: about twenty- five miles S.S.W. of the capital, in a well forty yards in depth, the upper part, and, as I was assured, the entire thickness, was formed of dark red Pampean mud without concretions. Southward of the Salado the country is low and swampy, with tosca-rock appearing at long intervals at the surface.
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