Geology of New York Volume 1

 
9781130604511: Geology of New York Volume 1

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1843 edition. Excerpt: ...son of the owner informed me that the Germans who came there last to open the mine, some years since, tried the water of a spring from the hill side, and found it to contain copper. He gave their mode of trial as follows: " Water from the spring was boiled down to a small quantity in an iron kettle; a silver sixpenny piece was then introduced, and taken out coated with copper." Any one acquainted with the relative chemical afiinities, knows this to be impossible, as the copper, if any, would be precipitated by the iron of the kettle. Copper would precipitate silver from solution, but silver would not precipitate copper under such circumstances. Some deception must have been practised, if the above statement of the process be correct. Another mine, a " silver mine," as it was called, was showed me on the bank of Dry brook, about three miles above Arkville, which is at the junction of the Bushkill and Dry brook with the east branch of the Delaware. A handsome adit has been excavated at the juncture of the grey grit with the red shale, leaving the former rock as a solid substantial rock roof. At the end of the adit, which penetrates horizontally some thirty or forty feet, a shaft has been sunk, and it is said that rooms of some size have been excavated in the rock below; but the shaft was full of water, so that nothing more could be examined than the adit. The mineral which is supposed to have caused this excavation, was common pyrites, which abounds at the junction of the grit and shale. It decomposes readily, causing the shale to crumble away by its decomposing action and the crystallizing power of the resulting salts. Specimens of the black sulphuret, and of the blue and green carbonates of copper in the gritty...

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