 | Benjamin Kendall Emerson, Joseph Hartshorn Perry - 1907 - 700 Seiten
...absorbed, and the resultant effect upon the eye is that of whiteness. The darker color of a IMilished surface is due merely to the fact that, through careful...surfaces are removed, the light penetrating the stone is ahsorhed, and the effect ujion the eye is that of a more or less complete absence of light, or darkness.... | |
 | Thomas Nelson Dale - 1908 - 250 Seiten
...their polished surfaces are the physical properties of chief economic importance. Doctor Merrill a explains the cause of these contrasts very satisfactorily:...and the greater the abundance of dark minerals, the o Merrill, Geo. P., The physical, chemical, and economic properties ot building stones: Maryland Geol.... | |
 | Geological Survey (U.S.) - 1908 - 1020 Seiten
...their polished surfaces are the physical properties of chief economic importance. Doctor Merrill ° explains the cause of these contrasts very satisfactorily:...and the greater the abundance of dark minerals, the » Merrill, Qeo. P., The physical, chemical, and economic properties ol building stones: Maryland Oeol.... | |
 | Geological Survey (U.S.) - 1914 - 598 Seiten
...hammered and polished surfaces, are properties of chief economic importance. Merrill * has explained the cause of these contrasts very satisfactorily:...and the greater the abundance of dark minerals, the greater will be the contrast between hammered and polished surfaces. This is a matter worthy of consideration... | |
 | David White - 1914 - 600 Seiten
...hammered and polished surfaces, are properties of chief economic importance. Merrill * has explained the cause of these contrasts very satisfactorily:...and the greater the abundance of dark minerals, the greater will be the contrast between hammered and polished surfaces. This is a matter worthy of consideration... | |
 | North Carolina. Geological Survey Section - 1906 - 382 Seiten
...careful grinding, all these irregularities and reflecting surfaces are removed, the light penetrates the stone, is absorbed, and the effect upon the eye...and the greater the abundance of dark minerals, the greater will be the contrast between hammered and polished surfaces. This is a matter worthy of consideration... | |
 | 1907 - 1200 Seiten
...absorbed, and the resultant effect upon the eye Is that of whiteness. The darker color of a liolished surface is due merely to the fact that, through careful...penetrating the stone is absorbed, and the effect ui»n the eye is that of n more or less complete absence of light, or darkness. Obviously, then, the... | |
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The impact of the hammer breaks up the granules on the immediate surface so that the light falling upon it is reflected, instead of absorbed, and the resultant effect upon the eye is that of whiteness. The darker color of a polished surface is due merely... 
