Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. It is mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard chalk and wallboard. A massive fine-grained white or tinted variety of gypsum, called alabaster, has been used for sculpture by many cultures including Ancient Egypt, Ancient Rome, the Byzantine Empire and the Nottingham alabasters of Medieval England. Gypsum crystallizes as beautiful translucent crystals of selenite, it forms as an evaporite mineral and as a hydration product of anhydrite. The Mohs scale of mineral hardness defines hardness value 2 as gypsum based on scratch hardness comparison; the word gypsum is derived from the Greek word γύψος, "plaster". Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum used for various purposes, this dehydrated gypsum became known as plaster of Paris. Upon addition of water, after a few tens of minutes plaster of Paris becomes regular gypsum again, causing the material to harden or "set" in ways that are useful for casting and construction.
Gypsum was known in Old English as spærstān, "spear stone", referring to its crystalline projections.. In the mid-18th century, the German clergyman and agriculturalist Johann Friderich Mayer investigated and publicized gypsum's use as a fertilizer. Gypsum may act as a source of sulfur for plant growth, in the early 19th century, it was regarded as an miraculous fertilizer. American farmers were so anxious to acquire it that a lively smuggling trade with Nova Scotia evolved, resulting in the so-called "Plaster War" of 1820. In the 19th century, it was known as lime sulfate or sulfate of lime. Gypsum is moderately water-soluble and, in contrast to most other salts, it exhibits retrograde solubility, becoming less soluble at higher temperatures; when gypsum is heated in air it loses water and converts first to calcium sulfate hemihydrate, and, if heated further, to anhydrous calcium sulfate. As for anhydrite, its solubility in saline solutions and in brines is strongly dependent on NaCl concentration.
Gypsum crystals are found to contain hydrogen bonding. Gypsum occurs in nature as flattened and twinned crystals, transparent, cleavable masses called selenite. Selenite contains no significant selenium. Selenite may occur in a silky, fibrous form, in which case it is called "satin spar", it may be granular or quite compact. In hand-sized samples, it can be anywhere from transparent to opaque. A fine-grained white or tinted variety of gypsum, called alabaster, is prized for ornamental work of various sorts. In arid areas, gypsum can occur in a flower-like form opaque, with embedded sand grains called desert rose, it forms some of the largest crystals found in nature, up to 12 m long, in the form of selenite. Gypsum is a common mineral, with thick and extensive evaporite beds in association with sedimentary rocks. Deposits are known to occur in strata from as far back as the Archaean eon. Gypsum is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, sulfate solutions in veins.
Hydrothermal anhydrite in veins is hydrated to gypsum by groundwater in near-surface exposures. It is associated with the minerals halite and sulfur. Gypsum is the most common sulfate mineral. Pure gypsum is white, but other substances found as impurities may give a wide range of colors to local deposits; because gypsum dissolves over time in water, gypsum is found in the form of sand. However, the unique conditions of the White Sands National Monument in the US state of New Mexico have created a 710 km2 expanse of white gypsum sand, enough to supply the construction industry with drywall for 1,000 years. Commercial exploitation of the area opposed by area residents, was permanently prevented in 1933 when president Herbert Hoover declared the gypsum dunes a protected national monument. Gypsum is formed as a by-product of sulfide oxidation, amongst others by pyrite oxidation, when the sulfuric acid generated reacts with calcium carbonate, its presence indicates oxidizing conditions. Under reducing conditions, the sulfates it contains can be reduced back to sulfide by sulfate-reducing bacteria.
Electric power stations burning coal with flue gas desulfurization produce large quantities of gypsum as a byproduct from the scrubbers. Orbital pictures from the Mars Reconnaissance Orbiter have indicated the existence of gypsum dunes in the northern polar region of Mars, which were confirmed at ground level by the Mars Exploration Rover Opportunity. Commercial quantities of gypsum are found in the cities of Grajaú in Brazil. Large open pit quarries are located in many places including Fort Dodge, which sits on one of the largest deposits of gypsum in the world, Plaster City, United States, East Kutai, Indonesia. Several small mines exist in places such as Kalannie in Western Australia, where gypsum is sold to private buyers for additions of calcium and sulfur as well as reduction of aluminum toxicities on soil for agricultural purposes. Crystals of gypsum u
Encyclopædia Britannica, Eleventh Edition
The Encyclopædia Britannica, Eleventh Edition is a 29-volume reference work, an edition of the Encyclopædia Britannica. It was developed during the encyclopaedia's transition from a British to an American publication; some of its articles were written by the best-known scholars of the time. This edition of the encyclopedia, containing 40,000 entries, is now in the public domain, many of its articles have been used as a basis for articles in Wikipedia. However, the outdated nature of some of its content makes its use as a source for modern scholarship problematic; some articles have special value and interest to modern scholars as cultural artifacts of the 19th and early 20th centuries. The 1911 eleventh edition was assembled with the management of American publisher Horace Everett Hooper. Hugh Chisholm, who had edited the previous edition, was appointed editor in chief, with Walter Alison Phillips as his principal assistant editor. Hooper bought the rights to the 25-volume 9th edition and persuaded the British newspaper The Times to issue its reprint, with eleven additional volumes as the tenth edition, published in 1902.
Hooper's association with The Times ceased in 1909, he negotiated with the Cambridge University Press to publish the 29-volume eleventh edition. Though it is perceived as a quintessentially British work, the eleventh edition had substantial American influences, not only in the increased amount of American and Canadian content, but in the efforts made to make it more popular. American marketing methods assisted sales; some 14% of the contributors were from North America, a New York office was established to coordinate their work. The initials of the encyclopedia's contributors appear at the end of selected articles or at the end of a section in the case of longer articles, such as that on China, a key is given in each volume to these initials; some articles were written by the best-known scholars of the time, such as Edmund Gosse, J. B. Bury, Algernon Charles Swinburne, John Muir, Peter Kropotkin, T. H. Huxley, James Hopwood Jeans and William Michael Rossetti. Among the lesser-known contributors were some who would become distinguished, such as Ernest Rutherford and Bertrand Russell.
Many articles were carried over from some with minimal updating. Some of the book-length articles were divided into smaller parts for easier reference, yet others much abridged; the best-known authors contributed only a single article or part of an article. Most of the work was done by British Museum scholars and other scholars; the 1911 edition was the first edition of the encyclopædia to include more than just a handful of female contributors, with 34 women contributing articles to the edition. The eleventh edition introduced a number of changes of the format of the Britannica, it was the first to be published complete, instead of the previous method of volumes being released as they were ready. The print type was subject to continual updating until publication, it was the first edition of Britannica to be issued with a comprehensive index volume in, added a categorical index, where like topics were listed. It was the first not to include long treatise-length articles. Though the overall length of the work was about the same as that of its predecessor, the number of articles had increased from 17,000 to 40,000.
It was the first edition of Britannica to include biographies of living people. Sixteen maps of the famous 9th edition of Stielers Handatlas were translated to English, converted to Imperial units, printed in Gotha, Germany by Justus Perthes and became part this edition. Editions only included Perthes' great maps as low quality reproductions. According to Coleman and Simmons, the content of the encyclopedia was distributed as follows: Hooper sold the rights to Sears Roebuck of Chicago in 1920, completing the Britannica's transition to becoming a American publication. In 1922, an additional three volumes, were published, covering the events of the intervening years, including World War I. These, together with a reprint of the eleventh edition, formed the twelfth edition of the work. A similar thirteenth edition, consisting of three volumes plus a reprint of the twelfth edition, was published in 1926, so the twelfth and thirteenth editions were related to the eleventh edition and shared much of the same content.
However, it became apparent that a more thorough update of the work was required. The fourteenth edition, published in 1929, was revised, with much text eliminated or abridged to make room for new topics; the eleventh edition was the basis of every version of the Encyclopædia Britannica until the new fifteenth edition was published in 1974, using modern information presentation. The eleventh edition's articles are still of value and interest to modern readers and scholars as a cultural artifact: the British Empire was at its maximum, imperialism was unchallenged, much of the world was still ruled by monarchs, the tragedy of the modern world wars was still in the future, they are an invaluable resource for topics omitted from modern encyclopedias for biography and the history of science and technology. As a literary text, the encyclopedia has value as an example of early 20th-century prose. For example, it employs literary devices, such as pathetic fallacy, which are not as common in modern reference texts.
In 1917, using the pseudonym of S. S. Van Dine, the US art critic and author Willard Huntington Wright published Misinforming a Nation, a 200+
The garrucha is a small pistol, similar to a derringer, common in southern Brazil and Argentina in the early 20th Century. It is double-barreled, though with the barrels side-by-side rather than vertical as is common in American derringers, the bores can be rifled or smooth. In Brazil, the most popular chamberings were for the.320 and.380 centrefire cartridges, similar to the.32 S&W and.38 S&W in appearance, but conical. They were chambered for the.22 Short.22 Long.22 Long Rifle, the.32, 8mm, 9mm Flobert cartridges, among others. These types of pistols were popular from 1930-1960 due to their low cost and small size, were associated with the gauchos of the South American pampas. In Brazil, Garruchas were produced by Castelo and Lerap. Belgian Garrucha Pistol & Garden Guns on Curator's Corner, NRA Blog, January 12, 2012 19:03 Derringer Howdah pistol
Autonomous communities of Spain
In Spain, an autonomous community is a first-level political and administrative division, created in accordance with the Spanish constitution of 1978, with the aim of guaranteeing limited autonomy of the nationalities and regions that make up Spain. Spain is not a federation, but a decentralized unitary state. While sovereignty is vested in the nation as a whole, represented in the central institutions of government, the nation has, in variable degrees, devolved power to the communities, which, in turn, exercise their right to self-government within the limits set forth in the constitution and their autonomous statutes; each community has its own set of devolved powers. Some scholars have referred to the resulting system as a federal system in all but name, or a "federation without federalism". There are 17 autonomous communities and two autonomous cities that are collectively known as "autonomies"; the two autonomous cities have the right to become autonomous communities, but neither has yet exercised it.
This unique framework of territorial administration is known as the "State of Autonomies". The autonomous communities are governed according to the constitution and their own organic laws known as Statutes of Autonomy, which contain all the competences that they assume. Since devolution was intended to be asymmetrical in nature, the scope of competences vary for each community, but all have the same parliamentary structure. Spain is a diverse country made up of several different regions with varying economic and social structures, as well as different languages and historical and cultural traditions. While the entire Spanish territory was united under one crown in 1479 this was not a process of national homogenization or amalgamation; the constituent territories—be it crowns, principalities or dominions—retained much of their former institutional existence, including limited legislative, judicial or fiscal autonomy. These territories exhibited a variety of local customs, laws and currencies until the mid nineteenth century.
From the 18th century onwards, the Bourbon kings and the government tried to establish a more centralized regime. Leading figures of the Spanish Enlightenment advocated for the building of a Spanish nation beyond the internal territorial boundaries; this culminated in 1833, when Spain was divided into 49 provinces, which served as transmission belts for policies developed in Madrid. However, unlike in other European countries such as France, where regional languages were spoken in rural areas or less developed regions, two important regional languages of Spain were spoken in some of the most industrialized areas, moreover, enjoyed higher levels of prosperity, in addition to having their own cultures and historical consciousness; these were Catalonia. This gave rise to peripheral nationalisms along with Spanish nationalism; therefore and social changes that had produced a national cultural unification in France had the opposite effect in Spain. As such, Spanish history since the late 19th century has been shaped by a dialectical struggle between Spanish nationalism and peripheral nationalisms in Catalonia and the Basque Country, to a lesser degree in Galicia.
In a response to Catalan demands, limited autonomy was granted to Catalonia in 1914, only to be abolished in 1923. It was granted again in 1932 during the Second Spanish Republic, when the Generalitat, Catalonia's mediaeval institution of government, was restored; the constitution of 1931 envisaged a territorial division for all Spain in "autonomous regions", never attained—only Catalonia, the Basque Country and Galicia had approved "Statutes of Autonomy"—the process being thwarted by the Spanish Civil War that broke out in 1936, the victory of the rebel Nationalist forces under Francisco Franco. During General Franco's dictatorial regime, centralism was most forcefully enforced as a way of preserving the "unity of the Spanish nation". Peripheral nationalism, along with communism and atheism were regarded by his regime as the main threats, his attempts to fight separatism with heavy-handed but sporadic repression, his severe suppression of language and regional identities backfired: the demands for democracy became intertwined with demands for the recognition of a pluralistic vision of the Spanish nationhood.
When Franco died in 1975, Spain entered into a phase of transition towards democracy. The most difficult task of the newly democratically elected Cortes Generales in 1977 acting as a Constituent Assembly was to transition from a unitary centralized state into a decentralized state in a way that would satisfy the demands of the peripheral nationalists; the Prime Minister of Spain, Adolfo Suárez, met with Josep Tarradellas, president of the Generalitat of Catalonia in exile. An agreement was made so that the Generalitat would be restored and limited competencies would be transferred while the constitution was still being written. Shortly after, the government allowed the creation of "assemblies of members of parliament" integrated by deputies and senators of the different territories of Spain, so that they could constitute "pre-autonomic regimes" for their regions as well; the Fathers of the Constitution had to strike a balance between the opposing views of Spain—on the one hand, the centralist view inherited from Franco's regime, on the other hand federalism and a pluralistic view of Spain as a "nation of nations".
The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and completely enclosed by land: on the north by Southern Europe and Anatolia, on the south by North Africa and on the east by the Levant. Although the sea is sometimes considered a part of the Atlantic Ocean, it is identified as a separate body of water. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was or desiccated over a period of some 600,000 years, the Messinian salinity crisis, before being refilled by the Zanclean flood about 5.3 million years ago. It covers an approximate area of 2.5 million km2, representing 0.7 % of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar-the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates Spain in Europe from Morocco in Africa- is only 14 km wide. In oceanography, it is sometimes called the Eurafrican Mediterranean Sea or the European Mediterranean Sea to distinguish it from mediterranean seas elsewhere.
The Mediterranean Sea has an average depth of 1,500 m and the deepest recorded point is 5,267 m in the Calypso Deep in the Ionian Sea. The sea is bordered on the north by Europe, the east by Asia, in the south by Africa, it is located between latitudes 30° and 46° N and longitudes 6° W and 36° E. Its west-east length, from the Strait of Gibraltar to the Gulf of Iskenderun, on the southwestern coast of Turkey, is 4,000 km; the sea's average north-south length, from Croatia's southern shore to Libya, is 800 km. The sea was an important route for merchants and travellers of ancient times that allowed for trade and cultural exchange between emergent peoples of the region; the history of the Mediterranean region is crucial to understanding the origins and development of many modern societies. The countries surrounding the Mediterranean in clockwise order are Spain, Monaco, Slovenia, Croatia and Herzegovina, Albania, Turkey, Lebanon, Egypt, Tunisia and Morocco. In addition, the Gaza Strip and the British Overseas Territories of Gibraltar and Akrotiri and Dhekelia have coastlines on the sea.
The Ancient Greeks called the Mediterranean ἡ θάλασσα or sometimes ἡ μεγάλη θάλασσα, ἡ ἡμέτερα θάλασσα, or ἡ θάλασσα ἡ καθ'ἡμᾶς. The Romans called it Mare Mare Internum and, starting with the Roman Empire, Mare Nostrum; the term Mare Mediterrāneum appears later: Solinus used it in the 3rd century, but the earliest extant witness to it is in the 6th century, in Isidore of Seville. It means'in the middle of land, inland' in Latin, a compound of medius, -āneus; the Latin word is a calque of Greek μεσόγειος, from μέσος and γήινος, from γῆ. The original meaning may have been'the sea in the middle of the earth', rather than'the sea enclosed by land'; the Carthaginians called it the "Syrian Sea". In ancient Syrian texts, Phoenician epics and in the Hebrew Bible, it was known as the "Great Sea" or as "The Sea". Another name was the "Sea of the Philistines", from the people inhabiting a large portion of its shores near the Israelites. In Modern Hebrew, it is called HaYam HaTikhon'the Middle Sea'. In Modern Arabic, it is known as al-Baḥr al-Mutawassiṭ'the Middle Sea'.
In Islamic and older Arabic literature, it was Baḥr al-Rūm'the Sea of the Romans' or'the Roman Sea'. At first, that name referred to only the Eastern Mediterranean, but it was extended to the whole Mediterranean. Other Arabic names were Baḥr al-šām'the Sea of Syria' and Baḥr al-Maghrib'the Sea of the West'. In Turkish, it is the Akdeniz'the White Sea'; the origin of the name is not clear, as it is not known in earlier Greek, Byzantine or Islamic sources. It may be to contrast with the Black Sea. In Persian, the name was translated as Baḥr-i Safīd, used in Ottoman Turkish, it is the origin of the colloquial Greek phrase Άσπρη Θάλασσα. Johann Knobloch claims that in Classical Antiquity, cultures in the Levant used colours to refer to the cardinal points: black referred to the north, yellow or blue to east, red to south, white to west; this would explain both the Turkish Akdeniz and the Arab nomenclature described above. Several ancient civilizations were located around the Mediterranean shores and were influenced by their proximity to the sea.
It provided routes for trade and war, as well as food for numerous communities throughout the ages. Due to the shared climate and access to the sea, c
Alcudia de Monteagud
Alcudia de Monteagud is a municipality of Almería province, in Spain. Alcudia de Monteagud - Diputación Provincial de Almería
The public domain consists of all the creative works to which no exclusive intellectual property rights apply. Those rights may have been forfeited, expressly waived, or may be inapplicable; the works of William Shakespeare and Beethoven, most early silent films, are in the public domain either by virtue of their having been created before copyright existed, or by their copyright term having expired. Some works are not covered by copyright, are therefore in the public domain—among them the formulae of Newtonian physics, cooking recipes, all computer software created prior to 1974. Other works are dedicated by their authors to the public domain; the term public domain is not applied to situations where the creator of a work retains residual rights, in which case use of the work is referred to as "under license" or "with permission". As rights vary by country and jurisdiction, a work may be subject to rights in one country and be in the public domain in another; some rights depend on registrations on a country-by-country basis, the absence of registration in a particular country, if required, gives rise to public-domain status for a work in that country.
The term public domain may be interchangeably used with other imprecise or undefined terms such as the "public sphere" or "commons", including concepts such as the "commons of the mind", the "intellectual commons", the "information commons". Although the term "domain" did not come into use until the mid-18th century, the concept "can be traced back to the ancient Roman Law, as a preset system included in the property right system." The Romans had a large proprietary rights system where they defined "many things that cannot be owned" as res nullius, res communes, res publicae and res universitatis. The term res nullius was defined as things not yet appropriated; the term res communes was defined as "things that could be enjoyed by mankind, such as air and ocean." The term res publicae referred to things that were shared by all citizens, the term res universitatis meant things that were owned by the municipalities of Rome. When looking at it from a historical perspective, one could say the construction of the idea of "public domain" sprouted from the concepts of res communes, res publicae, res universitatis in early Roman law.
When the first early copyright law was first established in Britain with the Statute of Anne in 1710, public domain did not appear. However, similar concepts were developed by French jurists in the 18th century. Instead of "public domain", they used terms such as publici juris or propriété publique to describe works that were not covered by copyright law; the phrase "fall in the public domain" can be traced to mid-19th century France to describe the end of copyright term. The French poet Alfred de Vigny equated the expiration of copyright with a work falling "into the sink hole of public domain" and if the public domain receives any attention from intellectual property lawyers it is still treated as little more than that, left when intellectual property rights, such as copyright and trademarks, expire or are abandoned. In this historical context Paul Torremans describes copyright as a, "little coral reef of private right jutting up from the ocean of the public domain." Copyright law differs by country, the American legal scholar Pamela Samuelson has described the public domain as being "different sizes at different times in different countries".
Definitions of the boundaries of the public domain in relation to copyright, or intellectual property more regard the public domain as a negative space. According to James Boyle this definition underlines common usage of the term public domain and equates the public domain to public property and works in copyright to private property. However, the usage of the term public domain can be more granular, including for example uses of works in copyright permitted by copyright exceptions; such a definition regards work in copyright as private property subject to fair-use rights and limitation on ownership. A conceptual definition comes from Lange, who focused on what the public domain should be: "it should be a place of sanctuary for individual creative expression, a sanctuary conferring affirmative protection against the forces of private appropriation that threatened such expression". Patterson and Lindberg described the public domain not as a "territory", but rather as a concept: "here are certain materials – the air we breathe, rain, life, thoughts, ideas, numbers – not subject to private ownership.
The materials that compose our cultural heritage must be free for all living to use no less than matter necessary for biological survival." The term public domain may be interchangeably used with other imprecise or undefined terms such as the "public sphere" or "commons", including concepts such as the "commons of the mind", the "intellectual commons", the "information commons". A public-domain book is a book with no copyright, a book, created without a license, or a book where its copyrights expired or have been forfeited. In most countries the term of protection of copyright lasts until January first, 70 years after the death of the latest living author; the longest copyright term is in Mexico, which has life plus 100 years for all deaths since July 1928. A notable exception is the United States, where every book and tale published prior to 1924 is in the public domain.