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" ... heat, while at a middling heat it may be drawn out under the hammer to a fine point. Care should be taken that before attempting to draw it out to a point the fracture is not concave; and should it be so, the end should be filed to an obtuse point... "
BUYERS' GUIDE TO MERCHANDISE - Seite 177
1873
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The gas & water engineer's book of reference, Band 104

George Bower - 1880
...white. Cracks, threads, or sparkling partirles denote bad quality. Good steel will not bear a white heal without falling to pieces, and will crumble under...that before attempting to draw it out to a point the (racture is not concave, and should it be so the end should be filed to an obtuse point before operating....
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Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to ...

H. C. Godwin - 1890 - 358 Seiten
...not bear a -white heat without falling to pieces, and will crumble under the hammer at a tright-rcA heat, while at a middling heat it may be drawn out...should be drawn out to a fine point and plunged into cold water; the fractured point should scratch glass. To test its toughness, place a fragment on a...
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Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to ...

H. C. Godwin - 1890 - 358 Seiten
...without falling to pieces, and will crumble under the hammer at a tri97tt-mi heat, while at a middlin9 heat it may be drawn out under the hammer to a fine...should be drawn out to a fine point and plunged into cold water; the fractured point should scratch glass. To test its toughness, place a fragment on a...
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The Art of Railroading: Or, The Technique of Modern Transportation, Band 6

Calvin Franklin Swingle, Frederick John Prior - 1906
...without falling to pieces, and will crumble under the hammer at a bright red heat, while at a mild red heat it may be drawn out under the hammer to a fine point. Case Hardening. Place horn, hoof, bonedust or shreds of leather, together with the article to be case...
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Applied Science for Metal Workers

William Henry Dooley - 1919 - 479 Seiten
...without falling to pieces. It will crumble under the hammer at a bright red heat, while at a moderate heat it may be drawn out under the hammer to a fine point. Iron is more active than copper. If a piece of iron wire is placed in a copper salt solution, the iron...
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