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− | [[File:1978.378-C34200CR-d1.jpg|thumb|Turned bedstead<br>MFA# 1978.378]]
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| == Description == | | == Description == |
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− | 1) An old, but common, name for [[sodium carbonate]] obtain from the Le Blanc process of alkali manufacture in which [[sodium sulfide]] and [[limestone]] are heated in the presence of an excess of coal. The coal gave the sodium carbonate a black color.
| + | A nineteenth century term for [[brick|bricks]] that were waterproofed by dipping in hot [[coal tar]] (Bucher 1996). |
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− | 2) The residue obtained from drying the black liquor obtained during papermaking. It contains sodium carbonate and carbon black which are collected, separated and reused. See [[black liquor]].
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− | 3) A species of a hardwood [[ash%20%28wood%29|ash]] tree, ''Fraxinus nigra'', native to North America. Black ash has a dark brown timber that is lightweight, tough and elastic. Also called brown ash and mountain ash, it was formerly used in aircraft construction.
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− | 4) A common name for [[barium sulfide]].
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− | == Synonyms and Related Terms ==
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− | 3) Fraxinus nigra; brown ash; mountain ash
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− | ==Physical and Chemical Properties==
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− | 3) A small to medium tree growing to 15 m with slender crown. Bark=gray-brown starting as smooth and becoming scaly Leaves=compound with opposite serrated leaflets Fruit=clusters of winged samara with tiny seed
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| ==Resources and Citations== | | ==Resources and Citations== |
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− | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 75
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− | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
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− | * Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, ''Technology and Conservation'', Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
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| * ''Dictionary of Building Preservation'', Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996 | | * ''Dictionary of Building Preservation'', Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996 |
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− | * Virginia Tech Dendrology website at www.fw.vt.edu/dendro/dendrology/main.htm (Accessed Dec. 9, 2005)
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| [[Category:Materials database]] | | [[Category:Materials database]] |