File:Frue Vanner diagrams.png

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Description
English: Diagrams of end, side and overhead views of a Frue Vanner, a machine invented in 1874 and used in the concentration of metalliferous ores.
Date
Source A Textbook of Ore Dressing, published by Hill Publishing Company, New York.
Author Robert H. Richards

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current16:16, 30 April 2009Thumbnail for version as of 16:16, 30 April 2009835 × 1,037 (162 KB)imagescommonswiki>Smalljim{{Information |Description={{en|1=Diagrams of end, side and overhead views of a Frue Vanner, a machine invented in 1874 and used in the concentration of metalliferous ores.}} |Source=A Textbook of Ore Dressing, published by Hill Publishi

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