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- Sally Ride (1826 bytes)
5: ...cs]], [[general relativity]], and [[free-electron laser physics]]. She later became the first American wo...
9: ...huttle accidents, the [[STS-51-L|''Challenger'' explosion]] and the [[Space Shuttle Columbia disaster]...
11: ... author of several children's books about space exploration. - Engraving (3556 bytes)
1: ...ay provide an [[intaglio (printmaking)|intaglio]] plate, when [[copper]] is engraved, or a [[relief pr...
5: ...orentine liners are flat-bottomed tools with multiple lines incised into them, used to do fill work on...
13: ...used to reproduce other forms of [[art]], for example [[painting]]s. Engravings continued to be commo...
18: [[Image:All32.jpg|thumb| An example of an ornately-engraved Conn tenor saxophone by ...
19: ... for commercial applications hand engraving was replaced with milling using [[CNC]] engraving/[[millin... - Glass (26176 bytes)
1: ...regular [[crystal]] lattice to form. A simple example is when [[Sucrose|table sugar]] is melted and co...
22: ...iber_amplifier|amplify]] transmitted signals by [[laser]] emission from within the glass itself.
26: ...s]]), but the same toolmaking techniques can be applied to industrially-made glass.
30: ...substances are always added to common glass to simplify processing. One is soda ([[sodium carbonate]] ...
37: ... by these compounds. The chemistry involved is complex and not well understood. New colored glasses ar... - Printing (4400 bytes)
21: A [[document]] can also be printed by a [[laser printer]], [[Inkjet printer|inkjet]], or other [[...
38: ===People=== - Timeline of invention (28171 bytes)
31: * [[Plough]]s in [[Mesopotamia]]
35: * 3500 BC: [[Plywood]] in [[History of ancient Egypt|Egypt]]
80: * [[600]]: Mouldboard [[plough]] in [[Eastern Europe]]
162: * [[1797]]: [[Cast iron plow]]: [[Charles Newbold]]
201: * [[1831]]: [[Multiple coil magnet]]: [[Joseph Henry]] - List of sports (7304 bytes)
1: ...hese categories are based on how the [[sport]] is played, and there are many more sports to be added. ...
6: ** [[Triple jump]]
16: ...[Steeplechase#Steeplechase in Track and Field|Steeplechase]]
27: Sports in which animals play a role.
33: ** [[Steeplechase]] - Tree (23723 bytes)
3: ...shrub]] for comparison). Compared with most other plant forms, trees are long-lived. A few species of ...
5: ...g [[orchard]] crops (e.g. [[apple]]s). Trees also play an important role in many of the world's [[myth...
9: ...gy)|orders]] and [[family (biology)|families]] of plants. Trees thus show a wide variety of growth for...
11: ...lant]]s and conifers. The listing below gives examples of many well known trees and how they are typic...
13: ...fined largely by the trees that inhabit them; examples are [[rainforest]] and [[taiga]] (see [[ecozone... - List of inventors (14020 bytes)
3: ...scientists]], [[List of inventions named after people]], [[timeline of invention]], [[inventor]].
20: ...3) - (1944), [[Belgian]]–American — [[plastic]]
49: *[[George Washington Carver]], (1860-1943), plant scientist
77: ...Eastwood]] (1857-1924) - reinforced concrete multiple arch dam
80: ...6-1971) — [[vacuum tube]] [[television]] display - Microscope (8708 bytes)
3: ...n enlarged image of an object placed in the focal plane of the lens(es).
7: ==Simple optical microscope==
8: ...ism to hold the material to be examined (the [[sample]] or specimen). This use of a single, convex len...
11: ...erration]]. In modern microscopes the mirror is replaced by a lamp unit providing stable, controllable...
34: ...on top of the cover slip, and the lens moved into place where it is immersed in the oil. An oil immers... - Apple Macintosh (24250 bytes)
2: ...ily of [[personal computer]]s manufactured by [[Apple Computer]], Inc. of [[Cupertino, California]], [...
4: ...as named after the [[McIntosh]], a variety of [[apple]] fruit favored by [[Jef Raskin]]. The original ...
7: ...the Mac OS under that name). In [[March 2001]], Apple introduced a modern and more secure [[Unix]]-bas...
24: * The [[PostScript]] [[laser printer]]
26: * User programmability through [[HyperCard]], [[AppleScript]] and Automator (Introduced in Mac OS X 10... - Pinhole camera (6994 bytes)
4: ...a obscura]]), or can expose film or a [[charge coupled device]] (CCD). Pinhole cameras with CCDs are ...
8: ...d [[circle of confusion]] is smaller at the image plane. An extremely small hole, however, can produce...
10: .... Industrially produced pinholes have access to [[Laser]] etching, but a hobbiest can still produce pinho...
23: ... the distance from the [[aperture]] to the [[film plane]], the infinite depth of field means everythin...
27: ... photographer for a particular purpose. In its simplest form, the photographic pinhole camera consists... - March 22 (9294 bytes)
6: *[[1621]] - The [[Pilgrims]] of [[Plymouth Colony]] sign a peace treaty with [[Massaso...
14: *[[1894]] - The first playoff game for the [[Stanley Cup]] starts.
15: *[[1895]] - First display (a private screening) of [[motion pictures]] by...
23: ...les Townes]] receive the first [[patent]] for a [[laser]].
24: *[[1963]] [[Please Please Me]] first [[Beatles]] [[album]] released in ... - Atlanta, Georgia (39442 bytes)
31: ...its suburbs were built was originally [[Creek (people)|Creek]] and [[Cherokee]] [[Native American|Indi...
33: ...s, Georgia|Athens]]. The terminus was originally planned for [[Decatur, Georgia|Decatur]], but its ci...
36: ...reparation for his punitive march south. After a plea by Father Thomas O'Reilly of Immaculate Concept...
41: ... raping and murdering a thirteen-year old white employee. After doubts about Frank's guilt led his de...
45: ...ing the types of violent confrontations that took place in [[Selma, Alabama]] and [[Birmingham, Alabam... - Computer mouse (29399 bytes)
3: ...tion of a [[cursor]] on the [[computer display|display]].
5: ... be either ''mice'' or ''mouses''. See [[English plural]] for more information.
13: ...t ultimately, the mouse won out because of its simplicity and convenience.
15: ...[[1970]] for a ''"X-Y Position Indicator For A Display System"''. At the time, Engelbart intended tha...
17: ...us mouse.jpg|200px|thumb|left| An Apple Macintosh Plus's Mouse, 1986]] - Cornea (4779 bytes)
15: ...[fibroblast]]s. If the stroma is damaged, for example by injury or infection, it can lose its transpar...
19: * '''Corneal endothelium''': a simple [[squamous]] or low [[cuboid|cuboidal]] epitheli...
25: ...sed today, parts of the cornea are removed with [[laser]]s.
27: ...of a deceased donor can be [[transplantation|transplanted]]. Because there are few blood vessels in th...
29: ...grow into the synthetic cornea making it a full replacement. - Arsenic (12497 bytes)
145: == Applications ==
148: ...leaching from in-situ timbers (such as children's playground equipment) into surrounding soil, the mos...
156: ...it is [[direct bandgap]], and so can be used in [[laser diode]]s and [[LED]]s to directly convert [[elect...
170: ...ar and chalk and eaten by women to improve the complexion of their faces.
172: ... it is estimated that approximately 57 million people are drinking [[groundwater]] with arsenic concen... - Dysprosium (8843 bytes)
162: == Applications ==
163: ...ith [[vanadium]] and other elements, for making [[laser]] materials; its high [[thermal neutron]] absorpt... - Europium (8579 bytes)
153: == Applications ==
154: ...een used to dope some types of plastics to make [[laser]]s. Due to its ability to absorb neutrons, it is ...
157: ...st]] [[Eug讥-Antole Demar硹]], who suspected samples of the recently discovered element [[samarium]]...
197: ...eavy metals. The metal dust presents a fire and explosion hazard. Europium has no known biological rol... - Gallium (9500 bytes)
135: ... in [[bauxite]] and [[zinc]] ores. An important application is in the compound [[gallium arsenide]], u...
145: Gallium does not [[crystal]]lize in any of the simple [[crystal structure]]s. The stable phase under n...
149: == Applications ==
150: ...allium, with [[optoelectronic]] devices (mostly [[laser diode]]s and light-emitting diodes) as the second...
154: ...lium to stabilize the [[allotropy|allotrope]]s of plutonium. Much research is being devoted to galliu... - Hafnium (9162 bytes)
164: ...tudied as a possible power source for gamma ray [[laser]]s.
166: == Applications ==
170: *as the electrode in [[plasma cutting]] because of its ability to shed elec...
174: ...m) to construct small, high yield weapons with simple x-ray triggering mechanisms—the ''hafnium ...
185: ...tain this metal are rarely encountered by most people and the pure metal is not normally toxic but all...
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