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Put an egg-shell crushed fine, into a glass of water made acid by a teaspoonful of muriatic acid. After an hour or so the egg-shell will disappear, having been dissolved in the acid water. In like manner the blood holds various minerals in solution. Experiment 101. To hear the sounds of the heart. Locate the heart exactly. Borrow a stethoscope from some physician.
On the high peaks, of course, the winter cold often is intense, and on the sunless north side of Clingman there are overhangs or crevices where a little ice may be found the year around. Undoubtedly there is vast mineral wealth hidden in the Carolina mountains. A greater variety of minerals has been found here than in any other State save Colorado.
True, men have been here, some few poking into the dust of ancient ruins, more seeking minerals, and now and then one, fleeing the law, to be followed relentlessly by such as Roderick Norton. And yet there is the evidence, if one looks, that this desolate, shunned land once had its teeming tribes and its green fields.
Vitally important are the water and minerals, public lands and standing timber, forage and wild-life of this country. A fast-growing population will have vast future needs in these resources. We must more than match the substantial achievements in the half-century since President Theodore Roosevelt awakened the Nation to the problem of conservation.
We must adopt a program for the planned use of the petroleum reserves under the sea, which are and must remain vested in the Federal Government. We must extend our programs of soil conservation. We must place our forests on a sustained yield basis, and encourage the development of new sources of vital minerals.
Others beings are below us in evolution animals, plants, minerals, and elemental lives as the Angels are above us; and as we thus study, a conception dawns upon us of a vast Wheel of Life, of numberless existences, inter-related and necessary each to each, man as a living Intelligence, as a self-conscious being, having his own place in this Wheel.
Nevertheless, I am assured, that below the force of the frost, within the earth, the waters have recourse, and empty themselves out of sight into the sea, which, through the extremity of the frost, are constrained to do the same; by which occasion, the earth within is kept the warmer, and springs have their recourse, which is the only nutriment of gold and minerals within the same.
These observations led Darwin to the same conclusion as that arrived at some time before by Scrope namely that when crystallisation takes place in rock masses under the influence of great deforming stresses, a separation and parallel arrangement of the constituent minerals will result.
It would, however, be a great error to assume, as some have done, that the hypogene rocks, considered as aggregates of simple minerals, are really more homogeneous in their composition than the several members of the sedimentary series.
I have tried hard to evolve it out of hairs, wine, eggs, bones, and all manner of herbs; out of arsenic, mercury, and sulphur, and all the minerals and metals.... I have spent nights and days in dissolving, coagulating, amalgamating, and precipitating. Yet from all these things I derived neither profit nor joy."
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