gravity-feed tank
51dam — dam1 /dam/, n., v., dammed, damming. n. 1. a barrier to obstruct the flow of water, esp. one of earth, masonry, etc., built across a stream or river. 2. a body of water confined by a dam. 3. any barrier resembling a dam. v.t. 4. to furnish with a …
52Dam — /dam, dahm/, n. (Carl Peter) Henrik /kahrl pee ter hen rik/; Dan. /kahrddl pay teuhrdd hen rddik/, 1895 1976, Danish biochemist: Nobel prize for medicine 1943. * * * I Barrier built across a stream, river, or estuary to conserve water for such… …
53United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
54Newcomen steam engine — Animation of a schematic Newcomen steam engine. – Steam is shown pink and water is blue. – Valves move from open (green) to closed (red) The atmospheric engine invented by Thomas Newcomen in 1712, today referred to as a Newcomen steam engine (or… …
55Swimming pool sanitation — articleissues refimprove = January 2008 technical = August 2008Swimming pool sanitation refers to both visual clarity and levels of microflora, such as bacteria and viruses in swimming pools. The goal of sanitation is to prevent the spread of… …
56agricultural technology — Introduction application of techniques to control the growth and harvesting of animal and vegetable products. Soil preparation Mechanical processing of soil so that it is in the proper physical condition for planting is usually… …
57Dairy — For other uses, see Dairy (disambiguation). A dairy farm near Oxford, New York in the United States. A dairy is a business enterprise established for the harvesting of animal milk mostly from cows or goats, but also from buffalo, sheep, horses or …
58Supermarine Spitfire (late Merlin powered variants) — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =Supermarine Spitfire VIII in the markings of 457(RAAF) Sqn designer =R. J. Mitchell first flight =5 March 1936 introduction =1938 retired =1955, RAF status = primary …
59STS-118 — Infobox Space mission mission name = STS 118 insignia = STS 118 patch new.png| shuttle = Endeavour crew members = 7 launch pad = LC 39A launch = 8 August, 2007, 6:36:42 p.m. EDT (22:36:42 UTC) landing = 21 August, 2007, 12:33:20 p.m. EDT… …
60Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
