Scenery, Science and Art: Being Extracts from the Note-book of a Geologist and Mining Engineer

J. Van Voorst, 1854 - 323 páginas

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Página 292 - The ore in both cases is an auriferous pyrites, occurring in a whitish or white schist. The vein is worked at a depth of 90 feet or thereabouts, but has been proved to 160, and remains uniform. It yields about 6 dwts.

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