 It consists of lead 8G.r> to sulphur 13.5 in the hundred parts. Its value is much enhanced by the silver it carries, which varies from 30 to 56 ounces for the ton of 2,000 pounds of the galena. Besides the above, the components of the mine are ores of...  Sir Cosmo Digby - Страница 205написао/ла James Augustus St. John - 1843Пуни преглед - О овој књизи
 | John Stark - 1828 - 542 страница
...columella blotched with deep brown. Nearly 4 inches long. Inhabits the Indian seas. — Bonau. 3, tig. 185. This is the most common, and at the same time the most beautiful species of the genus. Gen. 17. CONCHOLEPAS, Lam. — Buccinum, Brug. Shell ovate, inflated,... | |
 | Freeman Hunt, Thomas Prentice Kettell, William Buck Dana - 1857 - 820 страница
...gravity is 5.4. It will be a rich and lasting source of copper to the mine. Ore of Lead.— Galena. — This is the most common, and at the same time, the most valuable ore of lead. It consists of lead 86.5 to sulphur 13.5 in the hundred parts. Its value is much... | |
 | 1857 - 802 страница
...gravity is 5.4. It will be a rich and lasting source of copper to the mine. Ore of Lead. — Galena. — This is the most common, and at the same time, the most valuable ore of lead. It consists of lead 8G.r> to sulphur 13.5 in the hundred parts. Its value is... | |
 | 1857 - 798 страница
...gravity is 5.4. It will be a rich and lasting source of copper to the mine. Ore of Lead. — Galena. — This is the most common, and at the same time, the most valuable ore of lead. It consists of lead 8G.O to sulphur 13.5 in the hundred parts. Its value is much... | |
 | Percy Albert Wagner - 1914 - 468 страница
...it to become disintegrated on exposure for a comparatively brief period to the atmospheric agencies. This is the most common, and at the same time the most important, variety of hardebank, because, as previously intimated, it is sooner or later encountered... | |
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