¹ Source: wiktionary.com
Definition of Blackens
1. blacken [v] - See also: blacken
Lexicographical Neighbors of Blackens
Literary usage of Blackens
Below you will find example usage of this term as found in modern and/or classical literature:
1. Pharmaceutical Journal by Royal Pharmaceutical Society of Great Britain (1850)
"... of potash forms glittering, deep-red, oblique, rectangular prisms ; blackens
by exposure to the atmosphere ..."
2. A Dictionary of Chemistry and the Allied Branches of Other Sciences by Henry Watts (1871)
"It dissolves sparingly in cold water, easily in boiling water and in alcohol.
When heated suddenly in a tube, it blackens and explodes. ..."
3. A Dictionary of Chemistry: On the Basis of Mr. Nicholson's, in which the ...by Andrew Ure, William Nicholson by Andrew Ure, William Nicholson (1821)
"It blackens, and becomes magnetic before the blow-pipe. It effervesces with
muriatic acid. Its constituents are, oxide of iron 57.5, carbonic acid 36, ..."
4. Hand-book of Chemistry by Leopold Gmelin, Henry Watts (1852)
"... dark- brown mixture, which, when exposed to the air for a few days, forms a
translucent precipitate, which blackens on being collected. (Berzelius. ..."
5. Mineralogy Simplified: Easy Methods of Identifying Minerals, Including Ores by Henry Erni (1901)
"BB with soda give hepar which blackens silver when crushed upon it and moistened.
Do not give the reactions of the preceding divisions. a. ..."
6. Microscopical Determination of the Opaque Minerals: An Aid to the Study of Ores by Joseph Murdoch (1916)
"Instantly blackens with effervescence, leaving a rough surface. 2. KCN. ...
Instantly blackens and dissolves; develops structure. 5. ..."
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