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Books Bücher 1 - 5 von 5 in It is for this same reason that the hammered surface of one of these rocks is of...
" It is for this same reason that the hammered surface of one of these rocks is of a lighter color than the natural rock face or polished surface. The impact of the hammer breaks up the granules on the immediate surface so that the light falling upon it... "
...The Physical, Chemical and Economic Properties of Building Stones - Seite 63
von George Perkins Merrill - 1898 - 123 Seiten
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Bulletin, Ausgaben 313-315

1907
...chief economic importance. Doctor Merrill" explains the cause of these contrasts very satisfactorily : The impact of the hammer breaks up the granules on...the eye is that of whiteness. The darker color of a ]K)lished surface is due merely to the fact that, through careful grinding, all these irregularities...
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Bulletin, Ausgabe 2

North Carolina. Division of Mineral Resources - 1906
...planes in the feldspars. It is for this same reason that the hammered surface of a rock of this type is of a lighter color than the natural rock face or...hammer breaks up the granules on the immediate surface, not, it may be to the point of immediate disintegration, but enough so that the light falling upon...
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Bulletin - United States Geological Survey, Ausgabe 313

Geological Survey (U.S.) - 1907
...cause of these contrasts very satisfactorily : The impact of the hammer breaks up the granules 011 the immediate surface, so that the light falling upon...the eye is that of whiteness. The darker color of a l>olished surface is due merely to the fact that, through careful grinding, all these irregularities...
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The Green Schists and Associated Granites and Porphyries of Rhode Island

Benjamin Kendall Emerson, Joseph Hartshorn Perry - 1907 - 74 Seiten
...cause of these contrasts very satisfactorily : The impact of the hammer breaks up the granules on (ho immediate surface, so that the light falling upon...the eye is that of whiteness. The darker color of a IMilished surface is due merely to the fact that, through careful grinding, all these irregularities...
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Congressional Serial Set

1907
...chief economic importance. Doctor Merrill " explains the cause of these contrasts very satisfactorily : The impact of the hammer breaks' up the granules on the immediate surface, so thiit the light falling upon it is reflected, instead of absorbed, and the resultant effect upon the...
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