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Books Bücher 1 - 9 von 9 in brittle. It is usually turned in a lathe, and worked down, first with a fine steel...
" brittle. It is usually turned in a lathe, and worked down, first with a fine steel tool, then with a coarse stone, "
A Treatise on the Building and Ornamental Stones of Great Britain and ... - Seite 174
von Edward Hull - 1872 - 333 Seiten
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Manual of mineralogy: including observations on mines, rocks, reduction of ...

James Dwight Dana - 1851 - 432 Seiten
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of Mineralogy

James Dwight Dana - 1855 - 432 Seiten
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual Of Mineralogy

James D. Dana, A.M. - 1855
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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MANUAL OF MINERALOGY (1857)

JAMES D. DANA, A.M. - 1857
...How is fiuor spar distinguished from beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of Mineralogy, Including Observations on Mines, Rocks, Reduction of ...

James Dwight Dana - 1864 - 456 Seiten
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of Mineralogy: Including Observations on Mines, Rocks, Reduction of ...

James Dwight Dana - 1866 - 454 Seiten
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a lathe, and worked...with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of mineralogy including observations on mines, rocks, reduction of ...

James D. Dana - 1876
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of be« ing brittle. It is usually turned in a lathe, and worked...with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of Mineralogy: Including Observations on Mines, Rock, Reduction of ...

James Dwight Dana - 1876 - 454 Seiten
...beautiful. The mineral is difficult to work on account of being brittle. It is usually turned in a latho, and worked down first with a fine steel tool ; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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Manual of Mineralogy: Including Observations on Mines, Rocks, Reduction of ...

James Dwight Dana - 1877 - 454 Seiten
...banded with yellowish white, are very beautiful. The mineral is difficult to work on account of be. ing brittle. It is usually turned in a lathe, and worked...with a fine steel tool; then with a coarse stone, and afterwards with pumice and emery. The crevices which occur in the masses are sometimes concealed...
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