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Jihlava Jihlava
Jihlava, Czech Republic Iglau Founded in 799 and named after the Jihlava River on which it lies. The name may be derived from the Old Czech igla ‘needle’ (modern Czech jehla) because the river bed was covered with sharp needle‐like stones, or from the German Igel... Read more
Chibcha Chibcha
Chibcha , indigenous people of the eastern cordillera of the Andes of Colombia. Although trade with neighboring tribes was common, the Chibcha seem to have evolved their culture in comparative isolation. They were the most highly developed of the Colombians, practicing agriculture, melting and... Read more
puna puna
puna , high plateau region, 12,000 to 16,000 ft (3,658-4,877 m) high, between ridges of the Andes in Peru and Bolivia. Arid, cold, and in general, covered by short coarse grass, the puna has, nevertheless, long supported an Native American population. The icy wind sweeping the mineral-rich plateaus... Read more
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Covered Wagon Covered Wagon
COVERED WAGON COVERED WAGON, the means of transcontinental transportation used for two centuries of American history. The covered wagon was fundamentally a wagon box with a framework of hoop-shaped slats over which a canvas tent was stretched to make a "covered" wagon. Each wagon was... Read more
Sierra Madre (mountains) Sierra Madre (mountains)
Sierra Madre , chief mountain system of Mexico, consisting of the Sierra Madre Oriental, the Sierra Madre Occidental, and the Sierra Madre del Sur and forming the dissected edges of the vast central Mexican plateau; a volcanic belt along the plateau's southern edge links the three sierras. Extending... Read more
Building materials Building materials
BUILDING MATERIALS BUILDING MATERIALS. The Indian peoples of North America had developed mature building techniques suitable to Neolithic cultures long before Europeans established their first settlements on the continent. In the eastern area of America, forests covered most of the land, and... Read more
gas mask gas mask
gas mask face covering or device used to protect the wearer from injurious gases and other noxious materials by filtering and purifying inhaled air. In addition to military use (see chemical warfare ), gas masks are employed in mining, in industrial chemistry, and by firemen and rescue squads. The... Read more

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