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1828.mshaffer.com › Word [cobalt]
COBALT, n. A mineral of a reddish gray or grayish white color, very brittle, of a fine close grain, compact, but easily reducible to powder. It crystalizes in bundles of needles, arranged one over another. It is never found in a pure state; but usually as an oxyd, or combined with arsenic or its acid, with sulphur, iron, &c. Its ores are arranged under the following species, viz. Arsenical cobalt, of a white color, passing to steel gray; its texture is granular, and when heated it exhales the odor of garlic: gray cobalt, a compound of cobalt, arsenic, iron, and sulphur, of a white color, with a tinge of red; its structure is foliated, and its crystals have a cube for their primitive form; sulphuret of cobalt, compact and massive in its structure: oxyd of cobalt, brown or brownish black, generally friable and earthy: sulphate and arseniate of cobalt, both of red color, the former soluble in water. The impure oxyd of cobalt is called zaffer; but when fused with three parts of siliceous sand and an alkaline flux, it is converted into a blue glass, called smalt. The great use of cobalt is to give a permanent blue color to glass and enamels upon metals, porcelain and earthern wares. Cobalt-bloom, acicular arseniate of cobalt.Cobalt-crust, earthy arseniate of cobalt.
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Evolution (or devolution) of this word [cobalt]
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COBALT, n. A mineral of a reddish gray or grayish white color, very brittle, of a fine close grain, compact, but easily reducible to powder. It crystalizes in bundles of needles, arranged one over another. It is never found in a pure state; but usually as an oxyd, or combined with arsenic or its acid, with sulphur, iron, &c. Its ores are arranged under the following species, viz. Arsenical cobalt, of a white color, passing to steel gray; its texture is granular, and when heated it exhales the odor of garlic: gray cobalt, a compound of cobalt, arsenic, iron, and sulphur, of a white color, with a tinge of red; its structure is foliated, and its crystals have a cube for their primitive form; sulphuret of cobalt, compact and massive in its structure: oxyd of cobalt, brown or brownish black, generally friable and earthy: sulphate and arseniate of cobalt, both of red color, the former soluble in water. The impure oxyd of cobalt is called zaffer; but when fused with three parts of siliceous sand and an alkaline flux, it is converted into a blue glass, called smalt. The great use of cobalt is to give a permanent blue color to glass and enamels upon metals, porcelain and earthern wares. Cobalt-bloom, acicular arseniate of cobalt.Cobalt-crust, earthy arseniate of cobalt. | CO'BALT, n. [D. cobalt. This is said to be the G. kobold, a goblin, the demon of the mines; so called by miners, because cobalt was troublesome to miners, and at first its value was not known.]A mineral of a reddish gray or grayish white color, very brittle, of a fine close grain, compact, but easily reducible to powder. It crystalizes in bundles of needles, arranged one over another. It is never found in a pure state; but usually as an oxyd, or combined with arsenic or its acid, with sulphur, iron, &c. Its ores are arranged under the following species, viz. arsenical cobalt, of a white color, passing to steel gray; its texture is granular, and when heated, it exhales the odor of garlic; gray cobalt, a compound of cobalt, arsenic, iron, and sulphur, of a white color, with a tinge of red; its structure is foliated, and its crystals have a cube for their primitive form; sulphuret of cobalt, compact and massive in its structure; oxyd of cobalt, brown, or brownish black, generally friable and earthy; sulphate and arseniate of cobalt, both of a red color, the former soluble in water. The impure oxyd of cobalt is called zaffer; but when fused with three parts of silicious sand and an alkaline flux, it is converted into a blue glass, called smalt. The great use of cobalt is to give a permanent blue color to glass and enamels upon metals, porcelain, and earthen wares. – Fourcroy. Encyc. Cleaveland.
Cobalt-bloom, acicular arseniate of cobalt.
Cobalt-crust, earthy arseniate of cobalt. | Co"balt
- A tough, lustrous, reddish
white metal of the iron group, not easily fusible, and somewhat
magnetic. Atomic weight 59.1. Symbol Co.
- A commercial name of a crude arsenic
used as fly poison.
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1828 Webster | 1844 Webster | 1913 Webster |
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Cobalt COBALT, noun A mineral of a reddish gray or grayish white color, very brittle, of a fine close grain, compact, but easily reducible to powder. It crystalizes in bundles of needles, arranged one over another. It is never found in a pure state; but usually as an oxyd, or combined with arsenic or its acid, with sulphur, iron, etc. Its ores are arranged under the following species, viz. Arsenical cobalt of a white color, passing to steel gray; its texture is granular, and when heated it exhales the odor of garlic: gray cobalt a compound of cobalt arsenic, iron, and sulphur, of a white color, with a tinge of red; its structure is foliated, and its crystals have a cube for their primitive form; sulphuret of cobalt compact and massive in its structure: oxyd of cobalt brown or brownish black, generally friable and earthy: sulphate and arseniate of cobalt both of red color, the former soluble in water. The impure oxyd of cobalt is called zaffer; but when fused with three parts of siliceous sand and an alkaline flux, it is converted into a blue glass, called smalt. The great use of cobalt is to give a permanent blue color to glass and enamels upon metals, porcelain and earthern wares. COBALT-bloom, acicular arseniate of cobalt COBALT-crust, earthy arseniate of cobalt
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* As a note, I have purchased each of these products. In fact, as we have been developing the Project:: 1828 Reprint, I have purchased several of the bulky hard-cover dictionaries. My opinion is that the 2000-page hard-cover edition is the only good viable solution at this time. The compact edition was a bit disappointing and the CD-ROM as well. |
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