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Identifier: practicaldentalm00hodg (find matches)
Title: Practical dental metallurgy. A text- and reference-book for students and practitioners of dentistry ..
Year: 1897 (1890s)
Authors: Hodgen, Joseph Dupuy. (from old catalog)
Subjects: Dental metallurgy
Publisher: San Francisco, The Hicks-Judd co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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to roasting,amalgamating, or dissolving operations for the reductionor liberation of the metal. The great majority of metals are reduced by heat. Inthis process the ore, along with some kind of flux, isexposed to the direct action of a powerful fire, which inmost cases has a chemical as well as a physical function.It is intended, with the assistance of the flux, to breakup or burn away some chemical compound or component,or it is meant to deoxidize the ore. For these firey operations immense furnaces are con-structed of brick, granite, or other building stone, andlined with refractory or fire-resisting clay, brick, etc. FURNACES are best classified, by the methodadopted for supplying air, into two classes, viz., (1)blast-furnaces, (2) chimney-draught furnaces, the latter arealso known as air and wind furnaces. MELTING METALS. 61 Blast-Furnaces are supplied with air from a sourceunder pressure (Bf Fig. 2) sufficient to overcome theresistance to its free passage presented by the packed
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Fig. 2. Sectional View of Blast-Furnace. columns of fuel, flux, and ore. These are the oldest andsimplest forms of metallurgical contrivance. The open- 62 PRACTICAL DENTAL METALLURGY.

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  • bookid:practicaldentalm00hodg
  • bookyear:1897
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:Hodgen__Joseph_Dupuy___from_old_catalog_
  • booksubject:Dental_metallurgy
  • bookpublisher:San_Francisco__The_Hicks_Judd_co_
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:64
  • bookcollection:library_of_congress
  • bookcollection:americana
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29 July 2014

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