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Updated: May 17, 2025
Here, for example, are crystallised together in one mass, 1st, Pyrites, containing sulphur, iron, copper; 2dly, Blend, a composition of iron, sulphur, and calamine; 3dly, Galena, consisting of lead and sulphur; 4thly, Marmor metallicum, being the terra ponderosa, saturated with the vitriolic acid; a substance insoluble in water; 5thly, Fluor, a saturation of calcareous earth, with a peculiar acid, called the acid of spar, also insoluble in water; 6thly, Calcareous spar, of different kinds, being calcareous earth saturated with fixed air, and something besides, which forms a variety in this substance; lastly, Siliceous substance, or Quartz crystals.
A substance, for example, recently discovered by President Morton, and named by him Thallene, produces a very striking elongation of the spectrum, the new light generated being of peculiar brilliancy. Fluor spar, and some other substances, when raised to a temperature still under redness, emit light.
On the nostrils and fauces, when the secretion of these capillary glands is increased, it is termed simple catarrh; when in the intestines, a mucous diarrhoea; and in the urethra, or vagina, it has the name of gonorrhoea, or fluor albus.
Crevices and cavities, called "vughs" by the miners, have been filled more or less completely with crystals of fluor spar, quartz, and various ores of metals from true aqueous solutions, or by the action of super-heated steam.
Through this and other masonry the hot waters have been percolating for centuries, and have given rise to various zeolites apophyllite and chabazite among others; also to calcareous spar, arragonite, and fluor spar, together with siliceous minerals, such as opal all found in the inter-spaces of the bricks and mortar, or constituting part of their re-arranged materials.
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