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Updated: May 9, 2025
And, Why should the flint be formed first with cavities, and then made solid, after pyrites had been introduced into those cavities of the agate, and, as our author expresses it, parsemée pour toute la substance? Here are suppositions which are not only perfectly gratuitous, but are also inconsistent with any thing that we understand. This is not explaining nature; it is only feigning causes .
The strata include veins of quartz, carbonate of lime, and iron pyrites; they have been dislocated by an injected mass of greenish-brown feldspathic trap. Not only is salt abundant on the extreme western limits of the district between the Cordillera and the Pacific, but, according to Helms, it is found in the outlying low hills on the eastern flank of the Cordillera.
The pulverized quartz passes through them all. Under each bowl a fire is kept up, because heat forms the action of amalgamation. If there be any pyrites in the quartz, some common salt is thrown in to assist in releasing the gold from the embraces of the sulphurates, and preparing it to be seized by the mercury.
They belong to the genera Diprotodon and Nototherium of Professor Owen. The gold of Northern Chili is associated in the mines of Los Hornos with copper pyrites, in veins traversing the cretaceo-oolitic formations, so-called because its fossils have the character partly of the cretaceous and partly of the oolitic fauna of Europe.
Pyritic lodes usually contain a considerable proportion of calcareous matter, mostly carbonates, and consequently it appears not improbable that the gold may remain in some instances as a sulphide, particularly in samples of pyrites, in which it cannot be detected even by the microscope until by calcination the iron sulphide is changed to an oxide, wherein the gold may be seen in minute metallic specks.
Some have supposed that the mineral in question was not gold, but pyrites; but we have the assertion of Adrian Van der Donck, an eye-witness, and the experiment of Johannes de la Montagne, a learned doctor of medicine, on the golden side of the question.
In all appearance it is impregnated with nitre, if not with something more mischievous: we know that mundic, or pyrites, very often contains a proportion of arsenic, mixed with sulphur, vitriol, and mercury. Perhaps it partakes of the acid of some coal mine; for there are coal works in this district.
Straight from the ocean's depths rose towering cliffs, shot with brown and blues and greens withered moss and lichen and the verdigris of copper, and everywhere the rusty ocher of iron pyrites.
And presently they found, tucked away in Corrus's lion-skin, a large chunk of the pyrites, and a similar piece on Dulnop. "So these were the discoverers," commented Supreme. "What is your will in their case?" the subordinate asked. The commanding bee considered for a long time. Finally she got an idea, such as bees are known to get once in a great while.
Without being obliged to take that in tow, we might have kept at a greater distance from the shore, which would have enabled us to get on more rapidly, and with greater safety. On shore we found a great quantity of cubical pyrites in a grey matrix. The Esquimaux are attentive to this mineral, and have before now brought it to Okkak. 23d.
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