Difference between pages "Ash content" and "Barometer"

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== Description ==
 
== Description ==
  
A value computed as the percent weight of residual [[ash%20%28residue%29|ash]] compared to the original weight of the sample. Ash content is used to determine the total amount of noncombustible [[filler|fillers]], [[extender|extenders]], and [[pigments|pigments]] in a piece of paper.
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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.
  
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
Aschegehalt (Deut.); teneur en cendres (Fr.);
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Luftdruckmesser (Deut.); baromètre (Fr.);
  
 
==Resources and Citations==
 
==Resources and Citations==
  
* Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982
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* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993
  
* ''The Dictionary of Paper'', American Paper Institute, New York, Fourth Edition, 1980
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* Tom Rowland, Noel Riley, ''A-Z Guide to Cleaning, Conserving and Repairing Antiques'', Constable and Co., Ltd., London, 1981
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* Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997
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* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998
  
  
  
 
[[Category:Materials database]]
 
[[Category:Materials database]]

Latest revision as of 10:32, 2 May 2022

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.

Synonyms and Related Terms

Luftdruckmesser (Deut.); baromètre (Fr.);

Resources and Citations

  • 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
  • Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998

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