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" Nitric acid will produce a black spot on steel; the darker the spot the harder the steel. Iron, on the contrary, remains bright if touched with nitric acid. Good steel in its soft state has a curved fracture and a uniform gray lustre; in its hard state,... "
BUYERS' GUIDE TO MERCHANDISE - Seite 177
1873
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The gas & water engineer's book of reference

George Bower - 1880
...lustre ..... Hard and brittle Very light grey, with radiating crystal; . . . Extremely hard and brittle. Nitric acid will produce a black spot on steel; the...its soft state has a curved fracture and a uniform grey lustre ; in its hard state a dull, silvery, uniform white. Cracks, threads, or sparkling partirles...
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The works' managers' hand-book of modern rules, tables, and data for civil ...

Walter S. Hutton - 1885
...slightly hammer. To distinguish Steel from Iron. — Nitric acid does not affect iron, but produces a black spot on steel. The darker the spot the harder the steel. To harden Hammers and other Tools. — Bone dust, 2 parts ; common salt, 3 ; burnt leather shreds,...
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Morrison's Practical Engineer and Mechanics' Guide: Containing a Glance at ...

William A. Morrison - 1887 - 172 Seiten
...gives the limit of welding steel ; 20 gives the lowest limit of cast iron. To TEST STEEL AND IRON. Nitric acid will produce a black spot on steel ; the...its soft state has a curved fracture and a uniform gray lustre; in its hard state a dull, silvery, uniform white. Cracks, threads, or sparkling particles,...
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Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to ...

H. C. Godwin - 1890 - 358 Seiten
...the "limuoria." They both work from about the high-water mark to the surface of the mud. 228. To test Steel and Iron. — Scientific American. — Nitric...its soft state has a curved fracture and a uniform gray lustre; in its hard state, a dull, silvery, uniform white. Cracks, threads, or sparkling particles...
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Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to ...

Henry Colthurst Godwin - 1894 - 358 Seiten
...linmoria." They both work from about the high-water mark to the surface of the mud. 22S. To test Steiil and Iron. — Scientific American. — Nitric acid...its soft state has a curved fracture and a uniform gray lustre; in its hard state, a dull, silvery, uniform white. Cracks, threads, or sparkling particles...
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Railroad Engineers' Field-book and Explorers' Guide: Especially Adapted to ...

H. C. Godwin - 1890 - 358 Seiten
...water mark to the surface of the mud. 228. To test Steel and Iron. — Scientific American. — -~ic acid will produce a black spot on steel; the darker...its soft state has a curved fracture and a uniform gray lustre; in its hard state, a dull, silvery, uniform white. Cracks, threads, or sparkling particles...
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Morrison's Practical Engineer and Mechanics' Guide

William A. Morrison - 1895 - 144 Seiten
...gives the limit of welding steel ; 20 gives the lowest limit of cast iron. To TEST STEEI, AND IRON. Nitric acid will produce a black spot on steel; the...Iron, on the contrary, remains bright if touched with nii.ri'- acid. Good steel in its soft state has a curved fracture and a uniform gray lustre; in its....
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The Gas Engineer's Pocket-book, Comprising Tables, Notes, and Memoranda ...

Henry O'Connor - 1901 - 454 Seiten
...of hot-short iron. Good iron is readily heated soft under the hammer, and throws out but few sparks. Nitric acid will produce a black spot on steel ; the...its soft state has a curved fracture and a uniform grey lustre ; in its hard state, a dull, silvery, uniform white. Cracks, thread, or sparkling particles...
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The Works' Manager's Hand-book of Modern Rules, Tables, and Data for ..., Band 6

Walter S. Hutton - 1901 - 43 Seiten
...slightly hammer. To distinguish Steel from Iron. — Nitric acid docs not affect iron, but produces a black spot on steel. The darker the spot the harder the steel. To harden Hammers and other Tools. — Bone dust, 2 pans; common salt, 3 ; burnt leather shreds, I...
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The Scientific American Cyclopedia of Receipts, Notes and Queries

Albert Allis Hopkins - 1901 - 734 Seiten
...test iron and steel : Nitric acid will produce a hiark spot on steel; the darker the spot, the hauler the steel. Iron, on the contrary, remains bright if touched with nitric acid. <«ood steel in its soft state has a curve'! fracture and a mill orm gray luster, in its hard state,...
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