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Books Bücher 1 - 4 von 4 in ... glittering substance, principally consists of clay and flint, with a little magnesia...
" ... glittering substance, principally consists of clay and flint, with a little magnesia and oxide of iron. Instead of the mica, another substance called hornblende, is found in some granites ; hornblende is a dark crystalline substance, composed of flint,... "
Rudimentary Treatise on the Blasting and Quarrying of Stone for Building and ... - Seite 89
von Sir John Fox Burgoyne (bart.) - 1849 - 106 Seiten
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De Bow's Review of the Southern and Western States, Band 9

James Dunwoody Brownson De Bow - 1850
...crystalline substance, composed of flint, alumina and magnesia, besides a large proportion of the black oxyd of iron. Granites in which hornblende exists are sometimes...having been first found in the island of Syene in Egypt_i' " Syenite (fee thaw's Operative Masonry) is related to granite, and resembles it in its general...
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The Rudiments of the art of building: represented in five sections. The ...

John Bullock - 1853 - 180 Seiten
...is a dark crystalline substance, composed of flint, alumina, and magnesia, besides a large poportion of the black oxide of iron. Granites in which hornblende exists are sometimes called Syenite, having first been found in the island of Syene in Egypt. 185. Granite is found in mountain-chains, and usually...
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The rudiments of architecture and building: for the use of architects ...

John Bullock - 1855 - 468 Seiten
...is a dark crystalline substance, composed of flint, alumina, and magnesia, besides a large poportion of the black oxide of iron. Granites in which hornblende exists are sometimes called Syenite, having first been found in the island of Syene in Egypt. 185. Granite is found in mountain-chains, and usually...
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The Rudiments of Architecture and Building: For the Use of Architects ...

John Bullock - 1865 - 468 Seiten
...is a dark crystalline substance, composed of flint, alumina, and magnesia, besides a large poportion of the black oxide of iron. Granites in which hornblende exists are sometimes called Syenite, having first been found in the island of Syene in Egypt. T varieties are exceedingly friable and liable to...
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