 | William Newton, Charles Frederick Partington - 1820 - 538 pages
...obtained, carefully excluding all carbonaceous matter, and any substance from which carbon can be obtained. The stratum of de-carbonated steel, should not be...more than three times the depth of the engraving. The surface of the steel may be de-carbonated to any required thickness. To de-carbonate it to a proper... | |
 | 1820 - 534 pages
...obtained, carefully excluding all carbonaceous matter, and any substance from which carbon can be obtained. The stratum of de-carbonated steel, should not be...more than three times the depth of the engraving. The surface of the steel may be de-carbonated to any required thickness. To de-carbonate it to a proper... | |
 | 1824 - 628 pages
...carefully excluding all carbonaceous matter, and any substance from which carbon can be obtained. u The stratum of de-carbonated steel, should not be...more than three times the depth of the engraving. The surface of the steel may be de-carbonated to any required thickness. " To de-carbonate it to a... | |
 | 1873 - 1078 pages
...transferred or engraved designs, I use pure iron filings divested of all foreign or extraneous matters. Hie stratum of decarbonated steel should not be too thick...three times the depth of the engraving ; but for other puq>oscs the surface of the steel may be decarbonated to any* required thickness. To decarbonate it... | |
 | Ernest Spon - 1879 - 478 pages
...either transferred or engraved designs, pure iron filings, divested of all foreign matters, are used. The stratum of decarbonated steel should not be too...thickness. To decarbonate it to a proper thickness for a fine engraving, it is to be exposed for four hours in a white heat, enclosed in a cast-iron box with... | |
 | 1883 - 496 pages
...either transferred or engraved designs, pure iron filings, divested of all foreign matters, are used. The stratum of decarbonated steel should not be too...thickness. To decarbonate it to a proper thickness for a fine engraving, it is to be exposed for four hours in a white heat, enclosed in a cast-iron box with... | |
 | 1903 - 448 pages
...either transferred or engraved designs, pure iron filings, divested of all foreign matters, are used. The stratum of decarbonated steel should not be too...thickness. To decarbonate it to a proper thickness for a fine engraving, it is exposed for 4 hours to a white heat, enclosed in a cast-iron box with a wellclosed... | |
 | 1909 - 612 pages
...either transferred or engraved designs, pure iron filings, divested of all foreign matters, are used. The stratum of decarbonated steel should not be too...the surface of the steel may be decarbonated to any reI quired thickness. To decarbonate it j to a proper thickness for a fine engraving, it is exposed... | |
 | Sir Edward Denny Bacon - 1920 - 352 pages
...also carefully exclude all carbonaceous matter, and any substance from which carbon can be obtained. The stratum of decarbonated steel should not be too...more than three times the depth of the engraving. The surface of the steel may be decarbonated to any required thickness. To decarbonate it to a proper... | |
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The stratum of decarbonated steel should not be too thick for transferring fine and delicate engravings; for instance, not more than three times the depth of the engraving ; but for other purposes the surface of the steel may be decarbonated to any required... 