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Berber contains plenty of salt, which the natives find in some calcareous mountains between the desert and the fertile land. In its natural state, it is found mingled with a brown earth, with which the stone of those mountains is intermixed.
If the patient lives with this arteriosclerosis, a later stage of the arterial disease may occur which has been termed atheroma, with thickening, and possibly calcareous deposits in some parts of the walls of the vessels, while in other parts the coats become thinner and insufficient.
We move about in the dry open wood, keeping always near the trees, and truffle after truffle is turned up from the reddish light soil mixed with fragments of calcareous rock.
Several came begging them not to go, as the road was dangerous, and the people not all under the bashaw's control. They at length hired camels from a Targee, Hadge Said, but only to accompany them as far as the wadey Ghrurby. This course was over sands skirted with date trees, the ground strewed with fragments of calcareous crust, with a vitreous surface from exposure to the weather.
Their height is reputed to be nine thousand feet, but they have not yet been accurately measured. The mountains of La Hotte, which form the long southern tongue of land, rise to the height of seven thousand feet. They are all of calcareous formation, and abound in the caverns which are found in limestone regions.
If we accept the view taken by Wyville Thomson and his colleagues that the red clay is the residuum left after the calcareous matter of the Globigerinoe ooze has been dissolved away then clay is as much a product of life as limestone, and all known derivatives of clay may have formed part of animal bodies. Systema Naturae, Ed. xii., t. iii., p. 154.
Thus, in one part of a country, the soil will be calcareous, or containing much of that species of substance; in another, again, it will be argillaceous; in another sandy, where the prevailing substance is siliceous. These are the original soils; other substances may be considered as adventitious to this soil, though natural to the surface of the earth, which is covered with plants and animals.
The pathology of arteriosclerosis is a thickening and diminishing elasticity of the arteries, beginning with the inner coat and gradually spreading and involving all the coats, the larger arteries often developing calcareous deposits or thickened cartilaginous plates an atheroma.
They abound most in calcareous rocks, which is precisely what might be expected, since lime is necessary for the formation of the shells of the mollusks and articulata, and the hard substance of the crinoidea and corals; next in the carboniferous series; next in the tertiary; next in the new red sandstone; next in slates; and lastly, least of all, in the primary rocks.
These alternating masses are covered in the central parts by a great thickness of red sandstone, conglomerate, and calcareous clay-slate, associated with, and passing into, prodigious beds of gypsum. In these upper beds shells are tolerably frequent; and they belong to about the period of the lower chalk of Europe.
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