natron number

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• Lake Natron — Infobox lake lake name = Lake Natron image lake = NatronSouthSide.jpg caption lake = image bathymetry = caption bathymetry = location = northern Tanzania coords = coord|02|25|S|36|00|E|region:TZ type:waterbody|display=inline,title type = saline… …   Wikipedia

• Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …   Universalium

• Roman glass — objects have been recovered across the Roman Empire in domestic, industrial and funerary contexts. Glass was used primarily for the production of vessels, although mosaic tiles and window glass were also produced. Roman glass production developed …   Wikipedia

• Anglo-Saxon glass — has been found across England during archaeological excavations of both settlement and cemetery sites. Glass in the Anglo Saxon period was used in the manufacture of a range of objects including vessels, beads, windows and was even used in… …   Wikipedia

• Sodium bicarbonate — Sodium bicarbonate …   Wikipedia

• Sodium carbonate — Sodium carbonate …   Wikipedia

• East African lakes — ▪ lake system, East Africa Introduction  group of lakes in East Africa (eastern Africa). The majority of the East African lakes lie within the East African Rift System, which forms a part of a series of gigantic fissures in the Earth s crust… …   Universalium

• environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …   Universalium

• Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances …   Wikipedia

• Mining in Chad — The only mineral exploited in Chad was sodium carbonate, or natron. Also called sal soda or washing soda, natron was used as a salt for medicinal purposes, as a preservative for hides, and as an ingredient in the traditional manufacture of soap;… …   Wikipedia

• Mining industry of Chad — The only mineral exploited in Chad was sodium carbonate, or natron. Also called sal soda or washing soda, natron was used as a salt for medicinal purposes, as a preservative for hides, and as an ingredient in the traditional manufacture of soap;… …   Wikipedia