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Paddlewheeler
A paddle steamer is a steamship or steamboat powered by a steam engine that drives paddle wheels to propel the craft through the water. In antiquity, paddle wheelers followed the development of poles, oars and sails, where the first uses were wheelers driven by animals or humans. In the early 19th century, paddle wheels were the predominant way of propulsion for steam-powered boats. In the late 19th century, paddle propulsion was largely superseded by the screw propeller and other marine propulsion systems that have a higher efficiency, especially in rough or open water. Paddle wheels continue to be used by small, pedal-powered paddle boats and by some ships that operate tourist voyages. The latter are often powered by diesel engines. Paddle wheels The paddle wheel is a large steel framework wheel. The outer edge of the wheel is fitted with numerous, regularly spaced paddle blades (called floats or buckets). The bottom quarter or so of the wheel travels under water. An e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steamboat
A steamboat is a boat that is marine propulsion, propelled primarily by marine steam engine, steam power, typically driving propellers or Paddle steamer, paddlewheels. Steamboats sometimes use the ship prefix, prefix designation SS, S.S. or S/S (for 'Screw Steamer') or PS (for 'Paddle Steamer'); however, these designations are most often used for steamships. The term ''steamboat'' is used to refer to smaller, insular, steam-powered boats working on lakes and rivers, particularly riverboats. As using steam became more reliable, steam power became applied to larger, ocean-going vessels. Background Limitations of the Newcomen steam engine Early steamboat designs used Newcomen atmospheric engine, Newcomen steam engines. These engines were large, heavy, and produced little power, which resulted in an unfavorable power-to-weight ratio. The Newcomen engine also produced a reciprocating or rocking motion because it was designed for pumping. The piston stroke was caused by a water jet i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guido Da Vigevano
Guido da Vigevano or Guido da Vigevano da Pavia (born c. 1280; died c. 1349) was an Italian physician and inventor. He is notable for his sketchbook ''Texaurus regis Francie'', a catalog of military equipment, and his ''Anothomia Philippi Septimi'', an illustrated work on dissection. Each provides insight into the state of medieval technology and medicine. As an inventor, Guido can be regarded as a distant forerunner of later Renaissance artist-engineers like Taccola, Francesco di Giorgio Martini and Leonardo da Vinci. As an anatomist, Guido documents the practices of the fourteenth-century Bolognese school and its esteemed doctor Mondino de Luzzi. Life Guido was born around 1280 in Pavia, but nothing is known beyond his professional life. He attended the prestigious medical college at the University of Bologna where he learned from Mondino de Luzzi, one of the most influential doctors of the late Middle Ages. After completing his education he returned to Pavia to practice medic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anonymous Of The Hussite Wars
Anonymous may refer to: * Anonymity, the state of an individual's identity, or personally identifiable information, being publicly unknown ** Anonymous work, a work of art or literature that has an unnamed or unknown creator or author * Anonymity (social choice), a property of a voting rule, saying that it does not discriminate apriori between voters Organizations * Anonymous (hacker group), the collective name of loosely affiliated individuals who participate in hacktivism Film and television * "Anonymous" (''Australian Playhouse''), an Australian television play * ''Anonymous'' (2011 film), a 2011 film * ''Anonymous'' (TV series), a 2006 Irish television show * "Anonymous" (''CSI''), a 2000 episode of ''CSI: Crime Scene Investigation'' * "Anonymous" (''NCIS: Los Angeles''), a 2010 episode of ''NCIS: Los Angeles'' Music * Anonymous (band), an Andorran band * ''Anonymous'' (Blackbear album) (2019) * ''Anonymous'' (Stray from the Path album) (2013) * ''Anonym ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Rebus Bellicis
''De rebus bellicis'' ("On the Things of Wars") is an anonymous work of the 4th or 5th century which suggests remedies for the military and financial problems in the Roman Empire, including a number of fanciful war machines. It was written after the death of Constantine I in 337 (it is explicitly stated that Constantine was dead when the work was written) and before the fall of the Western Roman Empire in 476. Some researchers suggest that it may refer to the Battle of Adrianople of 378 (it refers to the serious threat posed by the barbarian tribes to the empire), or even the death of Emperor Theodosius I in 395, as it uses the plural form of the word "princeps", the title of the emperor, which may refer to the split of the Empire between Honorius and Arcadius after the death of Theodosius. Editions *''Anonymi Auctoris De Rebus Bellicis''. recensvit Robert I. (Bibliotheca scriptorvm Graecorvm et Romanorvm Tevbneriana), Lipsiae, 1984. * "Anónimo Sobre Asuntos Militares", Edi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odometer
An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two (electromechanical). The noun derives from ancient Greek , ''hodómetron'', from , ''hodós'' ("path" or "gateway") and , ''métron'' ("measure"). Early forms of the odometer existed in the ancient Greco-Roman world as well as in ancient China. In countries using Imperial units or US customary units it is sometimes called a mileometer or milometer, the former name especially being prevalent in the United Kingdom and among members of the Commonwealth. History Classical Era Possibly the first evidence for the use of an odometer can be found in the works of the ancient Roman Pliny (NH 6. 61-62) and the ancient Greek Strabo (11.8.9). Both authors list the distances of routes traveled by Alexander the Great (r. 336-323 BC) as by his bematists Diognetus and Baeton. However, the high ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vitruvius
Vitruvius (; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work entitled ''De architectura''. He originated the idea that all buildings should have three attributes: , , and ("strength", "utility", and "beauty"). These principles were later widely adopted in Roman architecture. His discussion of perfect proportion in architecture and the human body led to the famous Renaissance drawing of the ''Vitruvian Man'' by Leonardo da Vinci. Little is known about Vitruvius' life, but by his own descriptionDe Arch. Book 1, preface. section 2. he served as an artilleryman, the third class of arms in the Roman military offices. He probably served as a senior officer of artillery in charge of ''doctores ballistarum'' (artillery experts) and ''libratores'' who actually operated the machines. As an army engineer he specialized in the construction of ''ballista'' and '' scorpio'' artillery war machines for sieges. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Rome
In modern historiography, ancient Rome refers to Roman civilisation from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC), Roman Republic (509–27 BC) and Roman Empire (27 BC–476 AD) until the fall of the western empire. Ancient Rome began as an Italic settlement, traditionally dated to 753 BC, beside the River Tiber in the Italian Peninsula. The settlement grew into the city and polity of Rome, and came to control its neighbours through a combination of treaties and military strength. It eventually dominated the Italian Peninsula, assimilated the Greek culture of southern Italy ( Magna Grecia) and the Etruscan culture and acquired an Empire that took in much of Europe and the lands and peoples surrounding the Mediterranean Sea. It was among the largest empires in the ancient world, with an estimated 50 to 90 million inhabitants, roughly 20% of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Collins, Sons
William Collins, Sons (often referred to as Collins) was a Scottish printing and publishing company founded by a Presbyterian schoolmaster, William Collins, in Glasgow in 1819, in partnership with Charles Chalmers, the younger brother of Thomas Chalmers, minister of Tron Church, Glasgow. Collins merged with Harper & Row in 1990, forming a new publisher named HarperCollins. History The company had to overcome many early obstacles, and Charles Chalmers left the business in 1825. The company eventually found success in 1841 as a printer of Bibles, and, in 1848, Collins's son Sir William Collins developed the firm as a publishing venture, specialising in religious and educational books. The company was renamed William Collins, Sons and Co Ltd. in 1868. (The Library of Congress reports W. Collins & Co., or William Collins & Company, Collins & Co., etc., before "sometime in the 1860s", then "William Collins Sons and Co.") Although the early emphasis of the company had been on relig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morgan's Feathering Paddlewheel (Steam And The Steam Engine, Evers)
Henry Morgan & Company (colloquially Morgan's) was a Canadian department store chain founded by Henry Morgan in 1845. The first store was located in Montreal, and expanded to include 11 stores in Ontario and Quebec before being bought by Hudson's Bay Company in 1960. The stores in Ontario were converted to Hudson's Bay Company stores that year and renamed The Bay in 1965; the remaining Morgan's stores in Quebec were renamed La Baie in 1972. The flagship store was located in the Henry Morgan Building in Downtown Montreal, and remains a flagship property of the Hudson's Bay Company. History The first store was opened in Montreal in 1845 by Scottish immigrant Henry Morgan as Henry Morgan and Company at 200 Notre Dame Street (now 404 Notre Dame St. W), then moved in 1852 to 100 McGill Street (now 478 McGill St.; addition at 3-5 St. Joseph, now 610 Notre Dame W., in 1857) and again in 1866 to the north side of St. James Street (Saint Jacques Street) at Victoria Square. In 1891, they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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