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Polar Clock
Sir Charles Wheatstone (; 6 February 1802 – 19 October 1875) was an English physicist and inventor best known for his contributions to the development of the Wheatstone bridge, originally invented by Samuel Hunter Christie, which is used to measure an unknown electrical resistance, and as a major figure in the development of telegraphy. His other contributions include the English concertina, the stereoscope (a device for displaying three-dimensional images) and the Playfair cipher (an encryption technique). Life Charles Wheatstone was born in Barnwood, Gloucestershire. His father, W. Wheatstone, was a music-seller in the town, who moved to 128 Pall Mall, London, four years later, becoming a teacher of the flute. Charles, the second son, went to a village school, near Gloucester, and afterwards to several institutions in London. One of them was in Kennington, and kept by a Mrs. Castlemaine, who was astonished at his rapid progress. From another he ran away, but was captur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Laurence
Samuel Laurence (also spelled Lawrence; 1812–28 February 1884) was a British portrait painter. Life He was born at Guildford, Surrey, in 1812, and early manifested a great love for art. The first portraits which he exhibited were at the Society of British Artists in 1834, but in 1836 he sent three portraits, including that of Mrs. Somerville, to the exhibition of the Royal Academy. These were followed at the academy by portraits of the Right Hon. Thomas Erskine (theologian), Thomas Erskine, 1838; Thomas Carlyle, 1841; Sir Sir Frederick Pollock, 1st Baronet, Frederick Pollock, bart., 1842 and 1847; Charles Babbage, 1845; Dr. William Whewell, 1847; James Spedding, 1860; the Rev. William Hepworth Thompson, master of Trinity, and Robert Browning, 1869; Sir Sir Thomas Watson, 1st Baronet, Thomas Watson, bart., M.D., 1870; and the Rev. Frederick Denison Maurice, 1871. He exhibited also crayon drawings of Charles Dickens ('Sketch of Boz'), 1838; John Hullah, 1842; Professor Adam Sedg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the scientific study of matter, its Elementary particle, fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." It is one of the most fundamental scientific disciplines. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francesco Bartolozzi
__NOTOC__ Francesco Bartolozzi (21 September 1727 – 7 March 1815) was an Italian engraver, whose most productive period was spent in London. He is noted for popularizing the "crayon" method of engraving. Early life Bartolozzi was born in Florence in 1727. He was originally destined to follow the profession of his father, a gold- and silver-smith, but he manifested so much skill and taste in designing that he was placed under the supervision of two Florentine artists, Ignazio Hugford and Giovanni Domenico Ferretti, who instructed him in painting. After devoting three years to that art, he went to Venice and studied engraving. He spent six years there working for Joseph Wagner, an engraver and printseller, before setting up his own workshop. Early career His first productions in Venice were plates in the style of Marco Ricci and Francesco Zuccarelli. He then moved for a short time in 1762 to Rome, where he completed a set of engravings representing frescoes at Grottaferrat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyre
The lyre () (from Greek λύρα and Latin ''lyra)'' is a string instrument, stringed musical instrument that is classified by Hornbostel–Sachs as a member of the History of lute-family instruments, lute family of instruments. In organology, a lyre is considered a yoke lute, since it is a lute in which the strings are attached to a yoke that lies in the same plane as the sound table, and consists of two arms and a crossbar. The lyre has its origins in ancient history. Lyres were used in several ancient cultures surrounding the Mediterranean Sea. The earliest known examples of the lyre have been recovered at archeological sites that date to c. 2700 BCE in Mesopotamia. The oldest lyres from the Fertile Crescent are known as the eastern lyres and are distinguished from other ancient lyres by their flat base. They have been found at archaeological sites in Egypt, Syria, Anatolia, and the Levant. In a discussion of the Nubian lyre, Carl Engel notes that modern Egyptians call it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheatstone English Concertina
Wheatstone may refer to: * Cape Wheatstone, in Antarctica * Charles Wheatstone (1802–1875), a British scientist and inventor, eponymous for Wheatstone bridge * Cooke and Wheatstone Telegraph * Wheatstone, New Zealand, a locality in the Canterbury region * Wheatstone Glacier, in Antarctica * Wheatstone LNG * Wheatstone bridge A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to prov ..., a measuring instrument in electricity * Wheatstone Corporation, an American professional audio company See also * Whetstone (other) {{disambiguation, place name, surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windsor, Berkshire
Windsor is a historic town in the Royal Borough of Windsor and Maidenhead in Berkshire, England. It is the site of Windsor Castle, one of the official residences of the Monarchy of the United Kingdom, British monarch. The town is situated west of Charing Cross, central London, southeast of Maidenhead, and east of the modern county town of Reading, Berkshire, Reading. It is immediately south of the River Thames, which forms its boundary with its smaller, ancient twin town of Eton, Berkshire, Eton. The village of Old Windsor, just over to the south, predates what is now called Windsor by around 300 years. In the past, Windsor was formally referred to as New Windsor to distinguish the two. Etymology ''Windlesora'' is first mentioned in the ''Anglo-Saxon Chronicle.'' (The settlement had an earlier name but this is unknown.) The name originates from old English ''Windles-ore'' or ''winch by the riverside''.South S.R., ''The Book of Windsor'', Barracuda Books, 1977. This etymol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennington
Kennington is a district in south London, England. It is mainly within the London Borough of Lambeth, running along the boundary with the London Borough of Southwark, a boundary which can be discerned from the early medieval period between the Lambeth and St George's parishes of those boroughs respectively. It is located south of Charing Cross in Inner London and is identified as a local centre in the London Plan. It was a royal manor in the parish of St Mary, Lambeth in the county of Surrey and was the administrative centre of the parish from 1853. Proximity to central London was key to the development of the area as a residential suburb and it was incorporated into the metropolitan area of London in 1855. Kennington is the location of three significant London landmarks: the Oval cricket ground, the Imperial War Museum, and Kennington Park. Its population at the United Kingdom Census 2011 was 15,106. History Toponymy Kennington appears in the Domesday Book of 1086 as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plaque To Sir Charles Wheatstones' Childhood In Gloucester
Plaque may refer to: Commemorations or awards * Commemorative plaque, a plate, usually fixed to a wall or other vertical surface, meant to mark an event, person, etc. * Memorial Plaque (medallion), issued to next-of-kin of dead British military personnel after World War I * Plaquette, a small plaque in bronze or other materials Science and healthcare * Amyloid plaque * Atheroma or atheromatous plaque, a buildup of deposits within the wall of an artery * Dental plaque, a biofilm that builds up on teeth * A broad papule, a type of cutaneous condition * Pleural plaque, associated with mesothelioma, cancer often caused by exposure to asbestos * Senile plaques, an extracellular protein deposit in the brain implicated in Alzheimer's disease * Skin plaque, a plateau-like lesion that is greater in its diameter than in its depth * Viral plaque, a visible structure formed by virus propagation within a cell culture Other uses * Plaque, a rectangular casino token See also * * * Builder's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Encryption
In Cryptography law, cryptography, encryption (more specifically, Code, encoding) is the process of transforming information in a way that, ideally, only authorized parties can decode. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Despite its goal, encryption does not itself prevent interference but denies the intelligible content to a would-be interceptor. For technical reasons, an encryption scheme usually uses a pseudo-random encryption Key (cryptography), key generated by an algorithm. It is possible to decrypt the message without possessing the key but, for a well-designed encryption scheme, considerable computational resources and skills are required. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients but not to unauthorized users. Historically, various forms of encryption have been used to aid in cryptography. Early encryption ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereoscope
A stereoscope is a device for viewing a stereoscopy, stereoscopic pair of separate images, depicting left-eye and right-eye views of the same scene, as a single three-dimensional image. A typical stereoscope provides each eye with a lens that makes the image seen through it appear larger and more distant and usually also shifts its apparent horizontal position, so that for a person with normal binocular depth perception the edges of the two images seemingly fuse into one "stereo window". In current practice, the images are prepared so that the scene appears to be beyond this virtual window, through which objects are sometimes allowed to protrude, but this was not always the custom. A divider or other view-limiting feature is usually provided to prevent each eye from being distracted by also seeing the image intended for the other eye. Most people can, with practice and some effort, view stereoscopic image pairs in 3D without the aid of a stereoscope, but the physiological dept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Concertina
The English concertina is a member of the concertina family of free-reed musical instruments. Invented in England in 1829, it was the first instrument of what would become the concertina family. It is a fully chromatic instrument, having buttons in a rectangular arrangement of four staggered rows; its buttons are unisonoric, producing the same note on both the push and pull of the bellows. It differs from other concertinas in that the scale is divided evenly between the two hands, such that playing a scale involves both hands alternately playing each note in sequence. History The invention of the instrument is credited to Sir Charles Wheatstone; his earliest patent of a like instrument was granted 19 December 1829, No 5803 in Great Britain. The English concertina was initially used for playing classical music, virtuosic solos, and chamber music. By the 1860s-1870s, the English concertina grew more popular in the music hall tradition. The evangelical Salvation Army adopted all sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telegraphy
Telegraphy is the long-distance transmission of messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message. Thus flag semaphore is a method of telegraphy, whereas pigeon post is not. Ancient signalling systems, although sometimes quite extensive and sophisticated as in China, were generally not capable of transmitting arbitrary text messages. Possible messages were fixed and predetermined, so such systems are thus not true telegraphs. The earliest true telegraph put into widespread use was the Chappe telegraph, an optical telegraph invented by Claude Chappe in the late 18th century. The system was used extensively in France, and European nations occupied by France, during the Napoleonic era. The electric telegraph started to replace the optical telegraph in the mid-19th century. It was first taken up in Britain in the form of the Cooke and Wheatstone telegraph, initially used mostly as an aid to railw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
