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Alchemical Symbol
Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century. Although notation like this was mostly standardized, style and symbol varied between alchemists, so this page mainly lists the most common ones. Three primes According to Paracelsus (1493–1541), the three primes or ''tria prima'' – of which material substances are immediately composed – are: * Sulfur or soul, the principle of combustibility: 🜍 () * Mercury or spirit, the principle of fusibility and volatility: ☿ () * Salt or body, the principle of non-combustibility and non-volatility: 🜔 () Four basic elements Western alchemy makes use of the four classical elements. The symbols used for these are: * Air 🜁 () * Earth 🜃 () * Fire 🜂 () * Water 🜄 () Seven The seven metals known since Classical times in Europe were associated with the seven classical planets; this figured heavily in alchemical symbolism. The e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alchemical Symbols
Alchemical symbols, originally devised as part of alchemy, were used to denote some elements and some compounds until the 18th century. Although notation like this was mostly standardized, style and symbol varied between alchemists, so this page mainly lists the most common ones. Three primes According to Paracelsus (1493–1541), the three primes or ''tria prima'' – of which material substances are immediately composed – are: * Sulfur or soul, the principle of combustibility: 🜍 () * Mercury or spirit, the principle of fusibility and volatility: ☿ () * Salt or body, the principle of non-combustibility and non-volatility: 🜔 () Four basic elements Western alchemy makes use of the four classical elements. The symbols used for these are: * Air 🜁 () * Earth 🜃 () * Fire 🜂 () * Water 🜄 () Seven The seven metals known since Classical times in Europe were associated with the seven classical planets; this figured heavily in alchemical symbolism. The ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Object
In common usage and classical mechanics, a physical object or physical body (or simply an object or body) is a collection of matter within a defined contiguous boundary in three-dimensional space. The boundary must be defined and identified by the properties of the material. The boundary may change over time. The boundary is usually the visible or tangible surface of the object. The matter in the object is constrained (to a greater or lesser degree) to move as one object. The boundary may move in space relative to other objects that it is not attached to (through translation and rotation). An object's boundary may also deform and change over time in other ways. Also in common usage, an object is not constrained to consist of the same collection of matter. Atoms or parts of an object may change over time. An object usually meant to be defined by the simplest representation of the boundary consistent with the observations. However the laws of physics only apply directly to objects ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrum
Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. It has been produced artificially, and is also known as " green gold".Emsley, John (2003Nature's building blocks: an A–Z guide to the elements Oxford University Press. . p. 168 Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks. It was also used in the making of ancient drinking vessels. The first known metal coins made were of electrum, dating back to the end of the 7th century or the beginning of the 6th century BC. For several decades, the medals awarded with the Nobel Prize have been made of gold-plated green gold. Etymology The name "electrum" is the Latinized form of the Greek word ἤλεκτρον (''ḗlektron''), mentioned in the ''Ody ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Classical Planet
In classical antiquity, the seven classical planets or seven luminaries are the seven moving astronomical objects in the sky visible to the naked eye: the Moon, Mercury, Venus, the Sun, Mars, Jupiter, and Saturn. The word ''planet'' comes from two related Greek words, πλάνης ''planēs'' (whence πλάνητες ἀστέρες ''planētes asteres'' "wandering stars, planets") and πλανήτης ''planētēs'', both with the original meaning of "wanderer", expressing the fact that these objects move across the celestial sphere relative to the fixed stars. Greek astronomers such as Geminus and Ptolemy often divided the seven planets into the Sun, the Moon, and the five planets. The term ''planet'' in modern terminology is only applied to natural satellites directly orbiting the Sun (or other stars), so that only five of the seven classical planets are planets in the modern sense. The same seven planets, along with the ascending and descending lunar node, are mention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metals Of Antiquity
The metals of antiquity are the seven metals which humans had identified and found use for in prehistoric times in Europe and the Middle East: gold, silver, copper, tin, lead, iron, and mercury. These seven are the metals from which the modern world was forged; until the discovery of antimony in the 9th century,George Sarton, ''Introduction to the History of Science''. "We find in his writings ..preparation of various substances (e.g., basic lead carbonatic, arsenic and antimony from their sulphides)." and arsenic in the 13th (both now classified as metalloids), these were the only known elemental metals, compared to approximately 90 known today. Characteristics Melting point The metals of antiquity generally have low melting points, with iron being the exception. * Mercury melts at −38.829 °C (-37.89 °F) (being liquid at room temperature). * Tin melts at 231 °C (449 °F) * Lead melts at 327 °C (621 °F) * Silver at 961 °C (1763& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RSC Arms
RSC may refer to: Arts * Royal Shakespeare Company, a British theatre company * Reduced Shakespeare Company, a touring American acting troupe * Richmondshire Subscription Concerts, a music society in Richmond, North Yorkshire, England * Rock Steady Crew, a breakdancing crew and hip hop group from The Bronx, New York City Science and technology * Chromatin structure remodeling (RSC) complex, a 17-subunit complex with the capacity to remodel the structure of chromatin * Reconfigurable Supercomputing, a method of supercomputing that takes advantage of reconfigurable computing architectures (such as FPGAs) * Recursive Systematic Convolutional code, a type of convolutional code * Reed–Solomon code, a non-binary cyclic error-correcting code * Regular Slotted Container, a common form of corrugated fiberboard box * Reverse Standards Conversion, a video standards conversion process * RISC Single Chip, the single chip version of the POWER1 processor * Ribeyrolles, Sutter and Chau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Symbol (alchemical)
Water (chemical formula ) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite not providing food, energy or organic micronutrients. Its chemical formula, H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°. "Water" is also the name of the liquid state of H2O at standard temperature and pressure. A number of natural states of water exist. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds consist of suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water covers a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water (classical Element)
Water is one of the classical elements in ancient Greek philosophy along with air, earth and fire, in the Asian Indian system '' Panchamahabhuta'', and in the Chinese cosmological and physiological system '' Wu Xing''. In contemporary esoteric traditions, it is commonly associated with the qualities of emotion and intuition. Greek and Roman tradition Water was one of many ''archai'' proposed by the Pre-socratics, most of whom tried to reduce all things to a single substance. However, Empedocles of Acragas (c. 495 – c. 435 BC) selected four archai for his four roots: air, fire, water and earth. Empedocles roots became the four classical elements of Greek philosophy. Plato (427–347 BC) took over the four elements of Empedocles. In the Timaeus, his major cosmological dialogue, the Platonic solid associated with water is the icosahedron which is formed from twenty equilateral triangles. This makes water the element with the greatest number of sides, which Plato regarded as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Symbol (alchemical)
Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. At a certain point in the combustion reaction, called the ignition point, flames are produced. The ''flame'' is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different. Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Its negative effects include hazard to life and property, atmospheric pollution, and water contamination. If fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire (classical Element)
Fire is one of the four classical elements along with earth, water and air in ancient Greek philosophy and science. Fire is considered to be both hot and dry and, according to Plato, is associated with the tetrahedron. Greek and Roman tradition Fire is one of the four classical elements in ancient Greek philosophy and science. It was commonly associated with the qualities of energy, assertiveness, and passion. In one Greek myth, Prometheus stole ''fire'' from the gods to protect the otherwise helpless humans, but was punished for this charity. Fire was one of many '' archai'' proposed by the pre-Socratics, most of whom sought to reduce the cosmos, or its creation, to a single substance. Heraclitus considered ''fire'' to be the most fundamental of all elements. He believed fire gave rise to the other three elements: "All things are an interchange for fire, and fire for all things, just like goods for gold and gold for goods." Diels-Kranz B90 (Freeman 9481970p. 45. He had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Symbol (alchemical)
A variety of symbols or iconographic conventions are used to represent Earth, whether in the sense of planet Earth, or the inhabited world, or as a classical element. A circle representing the round world, with the rivers of Garden of Eden separating the four corners of the world, or rotated 45° to suggest the four continents, remains a common pictographic convention to express the notion of "worldwide". The current astronomical symbol for the planet is a circle with an intersecting cross, 20px, 🜨, alt=An equilateral cross enclosed in a circle. Although the International Astronomical Union (IAU) now discourages the use of planetary symbols, this is an exception, being used in abbreviations such as ''M''🜨 for Earth mass. History The earliest type of symbols are allegories, personifications or deifications, mostly in the form of an Earth goddess (in the case of Egyptian mythology a god, Geb). Before the recognition of the spherical shape of the Earth in the Hellenis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth (classical Element)
Earth is one of the classical elements, in some systems being one of the four along with air, fire, and water. European tradition Earth is one of the four classical elements in ancient Greek philosophy and science. It was commonly associated with qualities of heaviness, matter and the terrestrial world. Due to the hero cults, and chthonic underworld deities, the element of ''earth'' is also associated with the sensual aspects of both life and death in later occultism. Empedocles of Acragas proposed four '' archai'' by which to understand the cosmos: ''fire'','' air'', ''water'', and ''earth''. Plato (427–347 BCE) believed the elements were geometric forms (the platonic solids) and he assigned the cube to the element of ''earth'' in his dialogue '' Timaeus''. Aristotle (384–322 BCE) believed ''earth'' was the heaviest element, and his theory of '' natural place'' suggested that any ''earth–laden'' substances, would fall quickly, straight down, towards the center ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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