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- Timeline of invention (28171 bytes)
3: ...s ambiguity, the date of the first practical, fielded version of the invention is used here.
60: * [[Odometer]] : [[Ancient Rome|Rome]]: [[Archimedes]]?
66: ...ntury BC|200s BC]]: Compound [[pulley]]: [[Archimedes]]
74: * [[1st century]]: [[Rudder|Stern mounted rudder]] in [[History of China|China]]
83: * [[9th century|800s]]: [[Black powder|Gunpowder]] in [[History of China|China]] - Meteorology (19082 bytes)
12: ...d in [[1667]] by [[Robert Hooke]], while [[Horace de Saussure]] completed this list of the most import...
14: ... was also the first American to keep accurate and detailed records of weather conditions on a daily ba...
16: ...s was understood. Early in the 20th century this deflecting force was named after [[Gaspard-Gustave C...
18: ...lowed exchange of weather information with unprecedented speed.
20: ... [[front (meteorology)|front]]s, that is, sharply defined boundaries between air masses. - Anemometer (11426 bytes)
1: ...6 m) lengths. The wire (4 conductors running inside a shield) runs along the rightmost leg of the 3 l...
3: ...έτρον, a measure), is a device for measuring either the [[wind speed|velocit...
5: Anemometers may be divided into two classes, (1) those that measure the [[v...
7: ..., of the velocity of the wind to that of the cups depends very largely on the dimensions of the cups a...
9: The other forms of velocity anemometer may be described as belonging to the [[windmill]] type. In ... - Atmospheric pressure (6841 bytes)
6: ...ospheric pressure decreases with increasing altitude.
7: ... air would weigh about 100 [[kilonewton]]s. See [[density of air]].
10: ...tmosphere''" (1 ''[[Atmosphere (unit)|atm]]'') is defined as 101.325 [[kilopascal]]s (kPa).
13: ...?F (20?C), air density = 0.075 lb/ft³, altitude = sea level, and relative humidity = 0%. In the a...
16: ...e reduced to sea level by an appropriate altitude dependant formula. Ships at sea and low-lying weathe... - Pressure (9004 bytes)
12: Often ''F'' is taken to be the magnitude of the mean vector force normal to the surface of...
14: The [[gradient]] of pressure is [[force density]].
23: ...t. Pressure acts in all directions at a point inside a gas. At the surface of a gas, the pressure forc...
30: *''[[rho|ρ]]'' (rho) is the [[density]] of the fluid
38: ...or [[Cobra probe]], connected to a [[manometer]]. Depending on where the inlet holes are located on th... - Frederick Cook (12772 bytes)
2: ...[Robert Peary]] claimed to, April 6, 1909.<ref>Henderson, B. 2009, pp. 58-69</ref>
6: [[Image:Frederick Cook2.jpg|thumb|right|200px|Frederick Cook on South Michigan Avenue in [[Chicago]]]...
9: ...in 1890. On his 37th birthday he married Marie Fidele Hunt; they had one daughter, Helene. In 1923 t...
13: ...n missionary)|Thomas Bridges]] shortly before his death. As a result of that meeting, Cook brought bac...
15: ... a second expedition in 1906, and claim to have made the first ascent of that mountain (this claim is ... - Weather forecasting (4312 bytes)
5: ...m forecast the weather for an area. These fall under two categories: tools for collecting data and t...
7: ...' include instruments such as [[thermometer]]s, [[barometer]]s, [[hygrometer]]s, [[rain gauge]]s, [[anemomete...
9: ...ather map]]s and [[Computer simulation|computer model]]s in the form of [[Numerical Weather Prediction...
13: a computer model in a process called ''assimilation''. This ensur...
14: computer model holds the current weather conditions as accurate... - Alchemy (42222 bytes)
2: ...Alchemy can be regarded as the precursor of the modern science of chemistry prior to the formulation o...
4: ...|thumb|150px|left|Chemistry Clipart .Clipart provided by
8: ...] of gold and silver". The Arabic therefore could derive from a purely Greek word, not Coptic, and hav...
11: ...ormal)|magic]]. From today's perspective, their endeavours and beliefs have limited validity, but if w...
13: ... both an inner meaning referring to the spiritual development of the practitioner as well as a materia... - Mercury (element) (24761 bytes)
2: {| border="1" cellpadding="2" cellspacing="0" align="right...
4: {| align="center" border="0"
25: | [[Density]], [[Mohs hardness scale|Hardness]]
26: ...c metre|kg/m<sup>3</sup>]]<br/>solid @ −39 °C 15,600 [[kilogram per cubic metre|kg/m<sup>3</...
42: | [[van der Waals radius]] - Tree frog (1831 bytes)
15: ... are sometimes kept in confinement as a kind of [[barometer]].
17: ...rog]], ''H. viridis''. The [[spring peeper]] is widespread in the eastern [[United States]]. - Tree Frogs (1882 bytes)
15: ... are sometimes kept in confinement as a kind of [[barometer]].
17: ...rog]], ''H. viridis''. The [[spring peeper]] is widespread in the eastern [[United States]].
23: [[Image:redeyefrog.jpg|thumb|red eyed tree frog]] - Wind (17871 bytes)
4: Given a difference in [[barometer|barometric]] [[pressure]] between two air masses,...
6: ...s and are essentially unpredictable, such as dust devils and microbursts.
16: ...ion patterns]]. These include the [[Trade wind|Trade Winds]], the Westerlies, the Polar Easterlies, an...
20: ...r "track," and thus the phrase "the wind blows trade," that is to say, on track.
22: .... At about 30°N/S latitude, the air cools and descends. It then begins its journey back to the equ...
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