 | 1847 - 652 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...following table, condensed from the tanning records of 200,000 sides, exhibits the time required to tan the various descriptions of hides at Col. Pratt's... | |
 | 1847 - 1230 頁
...a current of air, will injure the color, giving ,-i darker hue, and rendering the leather harsh and brittle. To insure that the thick parts or butts,...for every side to become equally damp throughout. " In order to show the amount of business done, I have carefully collected and tabularized from my... | |
 | 1847 - 906 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts, shall roll smooth and even wilh the rest of the piece, it is necessary that the leather should be partially dried before wetting... | |
 | American Institute of the City of New York - 1848 - 854 頁
...a current of air, will injure the color, giving a darker 1 ue, and rendering the leather harsh and brittle. To insure that the thick parts or butts, shall roll smooth and even with the rest of ihe piece, it is necessary that the leather should be partially dried before wetting down for rolling,... | |
 | Julia de Fontenelle (Jean-Sébastien-Eugène) - 1852 - 592 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...following table, condensed from the tanning records of 200,000 hides, exhibits the time required to tan the periment. When, therefore, this instrument sinks... | |
 | Julia de Fontenelle (Jean-Sébastien-Eugène) - 1852 - 592 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...following table; condensed from the tanning records of 200,000 hides, exhibits the time required, to tan the perimont. When, therefore, this instrument sinks... | |
 | 1864 - 622 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...down for rolling, and that, when wet down, it should lie long enough for every side to become equally damp throughout. In the tanning records of 200,000... | |
 | Charles Louis Flint, Charles Francis McCay, John C. Merriam, Thomas Prentice Kettell, Linus Pierpont Brockett - 1870 - 642 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...down for rolling, and that, when wet down, it should lie long enough for every side to become equally damp throughout. In the tanning records of 200,000... | |
 | 1871 - 668 頁
...in a current of air, will injure the color, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...down for rolling, and that, when wet down, it should lie long enough for every side to become equally damp throughout. In the tanning records of 200,000... | |
 | Alexander Watt (F.R.S.S.A.) - 1885 - 506 頁
...current of air — will injure the colour, giving a darker hue, and rendering the leather harsh and brittle. To insure that the thick parts, or butts,...every side to become equally damp throughout." The average time for tanning by hemlock, in America, amounts to five months twenty-seven days ; sole leather,... | |
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... in the admission of air in drying, when first hung up to dry. No more air than is sufficient to keep the sides from moulding should be allowed. Too much air, or, in other words, if dried too rapidly in a current of air, will injure the color, giving... 