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- Timeline of invention (28171 bytes)
45: * [[sledges]] - [[Scandinavia]]
119: * [[1620]]: [[Slide rule]]: [[William Oughtred]]
281: * [[1877]]: [[Induction motor]]: [[Nikola Tesla]]
303: ...]) [[electric motor|induction motor]]: [[Nikola Tesla]]
318: ...olyphase AC [[Electric power]] system: [[Nikola Tesla]] (30 related patents.) - Roaring Twenties (28131 bytes)
5: ...automobile|car]]s and [[mass communication]] by [[radio]] spread the idea of modernity to a large parts o...
17: ...to the majority. The [[automobile]], [[movie]], [[radio]], and [[chemical industry|chemical industries]] ...
19: ...ce its introduction near the turn of the century. Radio entertainment was as varied as [[programming]] in...
21: ...mble beginnings in short, silent film reels. Like radio, film was a media for the masses. A view of a fil...
24: ...px|Climax of the new architectural style: the Chrysler Building in New York City was built after the E... - History of the United States (21226 bytes)
12: ...o forms of [[unfree labour|unfree labor]] such as slavery and indentured servitude, and a British poli...
38: ...point of sectional tensions over the expansion of slavery.
43: ...s which occasioned many anti-abolitionist and pro slave sentiments that still exist to this day.
47: ...slavery was abolished and the American nation was slowly reconstructed.
52: ...ustry and to create diverse communities in previously undeveloped areas, such as California. The expa... - Astronomy (13970 bytes)
54: ... equipment to detect and analyze [[light]] in and slightly around the [[wavelength]]s that can be dete...
58: ... transmission but much more sensitive. See also [[Radio telescope]]s.
64: Optical and radio astronomy can be performed with ground-based [[ob...
73: ... the motion of celestial bodies. His work was translated into [[Latin]] in the [[12th century]]. In th...
77: ...r]]s, [[pulsar]]s, [[blazar]]s and [[radio galaxy|radio galaxies]], and has used these observations to de... - Sun (20830 bytes)
163: ...g across the [[electromagnetic spectrum]], from [[radio]] through [[visible light]] to [[gamma rays]].
205: ...la]]. The Sun will then become a [[white dwarf]], slowly cooling over eons. This [[stellar evolution|...
272: * [http://science.msfc.nasa.gov/ssl/pad/solar/default.htm NASA/Marshall Solar Physics... - List of reference tables (55289 bytes)
49: **[[List of anonymously published works]]
234: ***[[Abbeys and priories in Isle of Man|Isle of Man]]
267: *[[List of islands]]
268: **[[List of islands of Australia]]
269: **[[List of islands of Canada]] - List of inventors (14020 bytes)
25: *[[Trevor Baylis]], (1937- ) — [[clockwork radio]]
82: *[[Reginald Fessenden]] — two-way [[radio]]
148: ...ielmo Marconi]], (1874-1937), [[Italy]] — [[radio]]
151: *[[Elijah McCoy]] — son of former slaves, patented many [[lubrication]] devices
173: *[[Slavoljub Eduard Penkala]], (1871-1922), [[Croatia]]... - Thomas Edison (20653 bytes)
18: ...Detroit]] and back again. He also worked as a pig slaughterer and started his own business selling [[v...
49: ...his employees) employed the tactics of misusing Tesla's patents to construct the first [[electric chai...
53: ...hers. AC distribution systems replaced DC, enormously extending the range and improving the safety and...
56: ...on, ninety-nine percent perspiration." [[Nikola Tesla]], possibly Edison's most famous employee who we...
73: ...]]), also with three children, [[Madeleine Edison Sloane|Madeleine]], [[Charles Edison|Charles]] (who ... - Agriculture (19147 bytes)
8: ...g|left|thumb|250px|[[Tea]] plantation in [[Java (island)|Java]], [[Indonesia]]]]
27: ...mer. More significantly, mechanization has enormously increased farm efficiency and productivity (see ...
29: ...g perishable products, and fighting forest fires. Radio and television disseminate vital weather reports ...
38: ...owing them to dictate terms and conditions previously unheard of. Some argue these companies are guilt...
42: ...riculture]], [[local food movement]], [[Slow Food|slow food]], and commercial [[organic farming]], tho... - Pioneer 11 (5118 bytes)
3: ...0]], used Jupiter's [[mass]] in a [[gravitational slingshot]] to alter its [[trajectory]] toward Satur...
5: ...the high-gain dish. The spacecraft contains two [[radioisotope thermoelectric generator]]s (RTGs), which ...
7: ...ids, an [[ultraviolet photometer]], an [[infrared radiometer]], and an [[imaging photopolarimeter]], whic...
21: Analysis of the radio tracking data from the Pioneer 10 and 11 spacecra... - World War II (58065 bytes)
46: ...man [[U-Boat]]s attempted to deprive the British Isles of necessary [[Lend Lease]] cargo from the Unit...
52: ===1941: Yugoslavia, Greece, Crete, Soviet Union, Continuation Wa...
54: ...41]]. Hitler's forces then invaded Greece and Yugoslavia on [[April 6]], [[1941]]. Hitler reluctantly ...
56: ...f the [[Metaxas Line]]. The rapid downfall of Yugoslavia, however, allowed German forces to pour into ...
58: ...roops. The Germans attacked the island simultaneously on the three airfields. Their invasion on two of... - Vietnam War (102682 bytes)
52: ...pean communist parties (with the exception of Yugoslav leader [[Tito]]), the situation was somewhat di...
69: ...ed the DRV as a free state with its own army, legislative body, and financial powers, in return for Ha...
87: ...[[Ngo Dinh Diem]], an anti-communist exile previously residing in New Jersey. Over French objections,...
91: ...public support in the [[1955]] referendum, infamously receiving over 600,000 votes from the approximat...
94: ... of cards. At the same time, Diem pursued ruthlessly repressive measures to protect his authority, us... - Timeline of United States history (1900-1929) (8003 bytes)
68: *[[1916]] - US acquires [[Virgin Islands]]
77: *[[1917]] - [[U.S. Virgin Islands]] purchased from [[Denmark]]
89: *[[1920]] - First [[radio]] broadcast in [[Pittsburgh, Pennsylvania]]
107: ...izenship granted to inhabitants of [[U.S. Virgin Islands]] - Timeline of United States history (1930-1949) (8681 bytes)
61: ...]] - [[Orson Welles]]' ''[[The War of the Worlds (radio)|The War of the Worlds]]'' broadcast - History of the United States (1918-1945) (54688 bytes)
16: ... which in retrospect after the crash were dangerously inflated.
36: ...he [[U.S. presidential election, 1924]] under the slogan "Keep Cool With Coolidge."
38: ... person elected to the U.S. Presidency who previously held neither national nor state elected office n...
46: ...ndustrial production, wholesale prices—were slipping downward.
52: ...sed. As production costs fell quickly, wages rose slowly, and prices remained constant, the bulk benef... - Tornado (14220 bytes)
3: ...-prone country for its size. Some common, related slang terms are: ''twister'', ''whirlwind'', ''wedge...
51: ...e weather warnings. Warnings are also carried on radio and television, and most communities have [[civil...
84: *[http://www.americaslibrary.gov/cgi-bin/page.cgi/es/ks/tornado_1 Tornad...
93: *[http://www.nssl.noaa.gov/researchitems/tornadoes.shtml National S... - Tropical cyclone (34538 bytes)
63: ... just west of [[Africa]] near the [[Cape Verde]] islands.
130: ... in mountainous areas, this can lead to deadly mudslides.
144: ...y only available if the storm is passing over an island or a coastal area, or it has overtaken an unfo...
156: ...d streams flood, roads become impassable, and landslides can occur.
177: ... hurricane season]] caused severe flooding and mudslides in [[Honduras]], killing about 18,000 people ... - April (9790 bytes)
107: *International Amateur Radio Month - Venus (planet) (31010 bytes)
14: ...ight and day sides of Venus despite its extremely slow rotation (less than one rotation per Venerean y...
18: ...ty of the atmosphere at Venus' surface, even such slow winds exert a significant amount of force again...
23: Venus has slow [[retrograde motion|retrograde rotation]], mean...
27: ...s's crust is stronger and thicker than had previously been assumed. It is theorized that Venus does no...
29: ...anets in the solar system. This may be due to its slow rotation being insufficient to drive an interna... - Jupiter (24639 bytes)
223: ...limited by the failed deployment of its high-gain radio transmitting antenna.
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