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1942 Experimental Cents
The 1942 experimental cents were pattern coins struck by the United States Mint to test alternative compositions for the penny. History After the outbreak of World War II, the demand for copper rose as it was used in ammunition and other military equipment. The US Mint researched ways to reduce or eliminate the usage of copper in cent production. The mint struck pattern coins in various metals, using the obverse design of the Colombian two centavo coin. Dies were sent to various companies to test possible non-metal compositions. Patterns were also struck with modified rim Lincoln cent dies. One of the compositions tested, zinc-coated steel, was chosen for the 1943 cent. Compositions Colombian patterns Lincoln patterns See also * Silver center cent * Ring cent * 1943 steel cent * 1974 aluminum cent The 1974 aluminum cent was a one-cent coin proposed by the United States Mint in 1973. It was composed of an alloy of aluminum and trace metals, and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Dollar
The United States dollar ( symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color. The monetary policy of the United States is conducted by the Federal Reserve System, which acts as the nation's central bank. The U.S. dollar was originally defined under a bimetallic standard of (0.7735 troy ounces) fine silver or, from 1837, fine gold, or $20.67 per troy ounce. The Gold Standard Act of 1900 linked the dollar solely to gold. From 1934, it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manganese
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. Manganese was first isolated in 1774. It is familiar in the laboratory in the form of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glass
Glass is a non-crystalline, often transparent, amorphous solid that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most often formed by rapid cooling (quenching) of the molten form; some glasses such as volcanic glass are naturally occurring. The most familiar, and historically the oldest, types of manufactured glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. Soda–lime glass, containing around 70% silica, accounts for around 90% of manufactured glass. The term ''glass'', in popular usage, is often used to refer only to this type of material, although silica-free glasses often have desirable properties for applications in modern communications technology. Some objects, such as drinking glasses and eyeglasses, are so commonly made of silicate-based glass that they are simply called by the name of the material. Despite bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rust (color)
Rust is an orange-brown color resembling iron oxide. It is a commonly used color in stage lighting and appears roughly the same color as photographic safelights when used over a standard tungsten light source. The first recorded use of ''rust'' as a color name in English was in 1692. Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill Page 203; Color Sample of Rust: Page 35 Plate 6 Color Sample A12 Origin Rust is named after the resulting phenomenon of the oxidation of iron. The word 'rust' finds its etymological origins in the Proto-Germanic word ''rusta'', which translates to "redness." The word is closely related to the term "ruddy," which also refers to a reddish coloring in an object. References See also * List of colors These are the lists of colors; * List of colors: A–F * List of colors: G–M * List of colors: N–Z * List of colors (compact) * List of colors by shade * List of color palettes * List of Crayola crayon colors * List of RAL ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coin Orientation
Coin orientation (or coin alignment or variations of these) is the relation of the vertical orientation of the images on the obverse and reverse sides of coins to one another. The two basic relations are called ''medallic orientation'' and ''coin orientation''. Medallic orientation Medallic orientation (or ''medal alignment'', or variations of these) derives its name from medals tagged to a uniform. For a medal to display properly, when the obverse of the medal is right side up, a left or right turn must show the reverse also to be right side up. In other words, the tops of the obverse and reverse share the same position. In Britain this is sometimes called "British turnover". British coinage, most other Commonwealth coinage, Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auburn Button Works And Logan Silk Mills
Auburn Button Works and Logan Silk Mills is a historic factory complex located at Auburn in Cayuga County, New York. It is a vernacular Italianate style industrial building built in 1879-1880 to house the Auburn Button Works and Logan Silk Mills. The complex has three parts: a three-story, rectangular main block; a two-story, rectangular west wing; and three story rectangular east wing. It is built of brick on a stone foundation. Includes six photos from 2007. Logan Silk Mills was famous for providing the silk for the gown of the First Lady Caroline Harrison wore when her husband, Benjamin Harrison, was inaugurated the 23rd President of the United States in 1889. The Logan Silk Mills went out of business the following year and the space was occupied by the Wegman Piano Company. The Auburn Button Works remained in the complex until about 1900. A fire swept through the west wing on May 1, 1914, and destroyed the third floor. The complex was used as manufacturing space for automobil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown
Brown is a color. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing or painting, brown is usually made by combining the colors orange and black. In the RGB color model used to project colors onto television screens and computer monitors, brown combines red and green. The color brown is seen widely in nature, wood, soil, human hair color, eye color and skin pigmentation. Brown is the color of dark wood or rich soil. According to public opinion surveys in Europe and the United States, brown is the least favorite color of the public; it is often associated with plainness, the rustic, feces, and poverty. More positive associations include baking, warmth, wildlife, and the autumn. Etymology The term is from Old English , in origin for any dusky or dark shade of color. The first recorded use of ''brown'' as a color name in English was in 1000. The Common Germanic adjectives ''*brûnoz and *brûnâ'' meant both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tan (color)
Tan is a pale tone of brown. The name is derived from tannum (oak bark) used in the tanning of leather. The first recorded use of ''tan'' as a color name in English was in the year 1590. Colors which are similar or may be considered synonymous to tan include: tawny, tenné, and fulvous. __TOC__ Variations of tan Sandy tan Displayed at right is the color ''Sandy tan''. This color was formulated by Crayola in 2000 as a Crayola marker color. Tan (Crayola) Displayed at right is the orangish tone of tan called ''tan'' since 1958 in Crayola crayons and 1990 in Crayola markers. Windsor tan Displayed at right is the color ''Windsor tan''. The first recorded use of ''Windsor tan'' as a color name in English was in 1925. Tuscan tan Displayed at right is the color ''Tuscan tan''. The first recorded use of ''Tuscan tan'' as a color name in English was in 1926. The normalized color coordinates for Tuscan tan are identical to café au lait and French beige, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black
Black is a color which results from the absence or complete absorption of visible light. It is an achromatic color, without hue, like white and grey. It is often used symbolically or figuratively to represent darkness. Black and white have often been used to describe opposites such as good and evil, the Dark Ages versus Age of Enlightenment, and night versus day. Since the Middle Ages, black has been the symbolic color of solemnity and authority, and for this reason it is still commonly worn by judges and magistrates. Black was one of the first colors used by artists in Neolithic cave paintings. It was used in ancient Egypt and Greece as the color of the underworld. In the Roman Empire, it became the color of mourning, and over the centuries it was frequently associated with death, evil, witches, and magic. In the 14th century, it was worn by royalty, clergy, judges, and government officials in much of Europe. It became the color worn by English romantic poets, businessmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grey
Grey (more common in British English) or gray (more common in American English) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is "without color", because it can be composed of black and white. It is the color of a cloud-covered sky, of ash and of lead. The first recorded use of ''grey'' as a color name in the English language was in 700 CE.Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill Page 196 ''Grey'' is the dominant spelling in European and Commonwealth English, while ''gray'' has been the preferred spelling in American English; both spellings are valid in both varieties of English. In Europe and North America, surveys show that grey is the color most commonly associated with neutrality, conformity, boredom, uncertainty, old age, indifference, and modesty. Only one percent of respondents chose it as their favorite color. Etymology ''Grey'' comes from the Middle English or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amber (color)
The color amber is a pure chroma color, located on the color wheel midway between the colors of yellow and orange. The color name is derived from the material also known as amber, which is commonly found in a range of yellow-orange-brown-red colors; likewise, as a color ''amber'' can refer to a range of yellow-orange colors. In English, the first recorded use of the term as a color name, rather than a reference to the specific substance, was in 1500. SAE/ECE amber Amber is one of several technically defined colors used in automotive signal lamps. In North America, SAE standard J578 governs the colorimetry of vehicle lights, while outside North America the internationalized European ECE regulations hold force. Both standards designate a range of orange-yellow hues in the CIE color space as "amber". In the past, the ECE amber definition was more restrictive than the SAE definition, but the current ECE definition is identical to the more permissive SAE standard. The SAE for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bakelite
Polyoxybenzylmethylenglycolanhydride, better known as Bakelite ( ), is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Leo Baekeland in Yonkers, New York in 1907, and patented on December 7, 1909 (). Because of its electrical nonconductivity and heat-resistant properties, it became a great commercial success. It was used in electrical insulators, radio and telephone casings, and such diverse products as kitchenware, jewelry, pipe stems, children's toys, and firearms. The "retro" appeal of old Bakelite products has made them collectible. The creation of a synthetic plastic was revolutionary for the chemical industry, which at the time made most of its income from cloth dyes and explosives. Bakelite's commercial success inspired the industry to develop other synthetic plastics. In recognition of its significance as the world's first commercial synthet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
