Difference between pages "Barometer" and "Black ash"

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[[File:1978.378-C34200CR-d1.jpg|thumb|Turned bedstead<br>MFA# 1978.378]]
 
== Description ==
 
== Description ==
  
An instrument used to measure [[atmospheric pressure]]. First invented in 1643 by Evangeliseta Torricele, a mercury barometer consists of a glass tube filled with mercury. Atmospheric pressure exerts a force on the mercury causing it to rise and fall with changes in the weather. Normal atmospheric pressure (1 atmosphere) is defined as 760 torrs or 760 millimeters of mercury.
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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.
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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]].
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
Luftdruckmesser (Deut.); baromètre (Fr.);
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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
  
 
==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
  
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
 
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
  
* Tom Rowland, Noel Riley, ''A-Z Guide to Cleaning, Conserving and Repairing Antiques'', Constable and Co., Ltd., London, 1981
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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
  
* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
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* ''Dictionary of Building Preservation'', Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
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* Virginia Tech Dendrology website at www.fw.vt.edu/dendro/dendrology/main.htm  (Accessed Dec. 9, 2005)
  
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 16:21, 7 May 2022

Turned bedstead
MFA# 1978.378

Description

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.

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.

3) A species of a hardwood 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.

4) A common name for Barium sulfide.

Synonyms and Related Terms

3) Fraxinus nigra; brown ash; mountain ash

Physical and Chemical Properties

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

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 75
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • 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
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Virginia Tech Dendrology website at www.fw.vt.edu/dendro/dendrology/main.htm (Accessed Dec. 9, 2005)

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