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Johann Maelzel
A metronome by Maelzel, Paris, 1815. Johann Nepomuk Maelzel (or Mälzel; August 15, 1772 – July 21, 1838) was a German inventor, engineer, and showman, best known for manufacturing a metronome and several music-playing automatons, and displaying a fraudulent chess machine. He worked with Beethoven to compose a piece of music for one of his inventions. Life and work Maelzel was born in Regensburg. The son of an organ builder, he received a comprehensive musical education. German Wikipedia He moved to Vienna in 1792. After several years of study and experiment, he produced an orchestrion instrument, which was publicly exhibited, and afterward sold for 3,000 florins. In 1804, he invented the panharmonicon, an automaton able to play the musical instruments of a military band, powered by bellows and directed by revolving cylinders storing the notes. This attracted universal attention; the inventor became noted throughout Europe, was appointed imperial court-mechanician at Vienna, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metronom Mälzel 1815
Metronom Eisenbahngesellschaft mbH is a German non-entirely-state-owned railway company based in Uelzen, Lower Saxony since December 2005. The company's activities focus exclusively on passenger transport, operating services from Hamburg to Bremen, Lüneburg and Uelzen, and from Uelzen to Hannover and Göttingen. Services listed on the timetables are abbreviated ''ME''. Furthermore, the company operates services from Wolfsburg to Hannover and Hildesheim under its other brand ''Enno''. The company's logo, depicting a swinging pendulum, is often rendered in lower case as ''metronom'' (the German word ' literally meaning ''metronome''). History At the end of the 1990s, the three participating States of Germany—Lower Saxony, Hamburg and Bremen—agreed to replace Regional-Express services on the routes between Hamburg and Bremen and Hamburg-Uelzen operated by DB Regio with their own railway company. The company was founded in February 2002 under the name of MetroRail. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ear Trumpet
An ear trumpet is a tubular or funnel-shaped device which collects sound waves and leads them into the ear. They were used as hearing aids, resulting in a strengthening of the sound energy impact to the eardrum and thus improved hearing for a deaf or hard-of-hearing individual. Ear trumpets were made of sheet metal, silver, wood, snail shells or animal horns. They have largely been replaced in wealthier areas of the world by modern hearing aid technology that is much smaller and less obtrusive, albeit more expensive. A sound trumpet does not "amplify" sound. It takes the sound power received over a large area and concentrates it into a smaller area. The received sound is louder, but no power has been created in the process. History The use of ear trumpets for the partially deaf dates back to the 17th century.Howard, Alexander. "Hearing Aids: Smaller and Smarter." New York Times, November 26, 1998. The earliest description of an ear trumpet was given by the French Jesuit priest a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century German Inventors
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century German Inventors
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century German Engineers
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century German Engineers
The 18th century lasted from January 1, 1701 ( MDCCI) to December 31, 1800 ( MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian Revolutions. During the century, slave trading and human trafficking expanded across the shores of the Atlantic, while declining in Russia, China, and Korea. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported slavery. The Industrial Revolution began during mid-century, leading to radical changes in human society and the environment. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revolution, with an emphasis on directly interconnected events. To historians who expand the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1838 Deaths
Events January–March * January 10 – A fire destroys Lloyd's Coffee House and the Royal Exchange in London. * January 11 – At Morristown, New Jersey, Samuel Morse, Alfred Vail and Leonard Gale give the first public demonstration of Morse's new invention, the telegraph. * January 11 Events Pre-1600 * 532 – Nika riots in Constantinople: A quarrel between supporters of different chariot teams—the Blues and the Greens—in the Hippodrome escalates into violence. * 630 – Conquest of Mecca: The prophet Muhamma ... - A 1838 Vrancea earthquake, 7.5 earthquake strikes the Romanian district of Vrancea County, Vrancea causing damage in Moldavia and Wallachia, killing 73 people. * January 21 – The first known report about the Lowest temperature recorded on Earth, lowest temperature on Earth is made, indicating in Yakutsk. * February 6 – Boer explorer Piet Retief and 60 of his men are massacred by King Dingane kaSenzangakhona of the Zulu people, afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1772 Births
Year 177 ( CLXXVII) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Commodus and Plautius (or, less frequently, year 930 ''Ab urbe condita''). The denomination 177 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Lucius Aurelius Commodus Caesar (age 15) and Marcus Peducaeus Plautius Quintillus become Roman Consuls. * Commodus is given the title ''Augustus'', and is made co-emperor, with the same status as his father, Marcus Aurelius. * A systematic persecution of Christians begins in Rome; the followers take refuge in the catacombs. * The churches in southern Gaul are destroyed after a crowd accuses the local Christians of practicing cannibalism. * Forty-seven Christians are martyred in Lyon (Saint Blandina and Pothinus, bishop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metronome
A metronome, from ancient Greek μέτρον (''métron'', "measure") and νομός (nomós, "custom", "melody") is a device that produces an audible click or other sound at a regular interval that can be set by the user, typically in beats per minute (BPM). Metronomes may include synchronized visual motion. Musicians use the device to practise playing to a regular pulse. A kind of metronome was among the inventions of Andalusian polymath Abbas ibn Firnas (810–887). In 1815, German inventor Johann Maelzel patented his mechanical, wind-up metronome as a tool for musicians, under the title "Instrument/Machine for the Improvement of all Musical Performance, called Metronome". In the 20th century, electronic metronomes and software metronomes were invented. Musicians practise with metronomes to improve their timing, especially the ability to stick to a regular tempo. Metronome practice helps internalize a clear sense of timing and tempo. Composers and conductors often use a me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcohol Poisoning
Alcohol intoxication, also known as alcohol poisoning, commonly described as drunkenness or inebriation, is the negative behavior and physical effects caused by a recent consumption of alcohol. In addition to the toxicity of ethanol, the main psychoactive component of alcoholic beverages, other physiological symptoms may arise from the activity of acetaldehyde, a metabolite of alcohol. These effects may not arise until hours after ingestion and may contribute to the condition colloquially known as a hangover. Symptoms of intoxication at lower doses may include mild sedation and poor coordination. At higher doses, there may be slurred speech, trouble walking, and vomiting. Extreme doses may result in a respiratory depression, coma, or death. Complications may include seizures, aspiration pneumonia, injuries including suicide, and low blood sugar. Alcohol intoxication can lead to alcohol-related crime with perpetrators more likely to be intoxicated than victims. Alcohol intoxica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venezuela
Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in the Caribbean Sea. It has a territorial extension of , and its population was estimated at 29 million in 2022. The capital and largest urban agglomeration is the city of Caracas. The continental territory is bordered on the north by the Caribbean Sea and the Atlantic Ocean, on the west by Colombia, Brazil on the south, Trinidad and Tobago to the north-east and on the east by Guyana. The Venezuelan government maintains a claim against Guyana to Guayana Esequiba. Venezuela is a federal presidential republic consisting of 23 states, the Capital District and federal dependencies covering Venezuela's offshore islands. Venezuela is among the most urbanized countries in Latin America; the vast majority of Venezuelans live in the cities of the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Guaira
La Guaira () is the capital city of the Venezuelan state of the same name (formerly named Vargas) and the country's main port. It was founded in 1577 as an outlet for Caracas, to the southeast. The town and the port were badly damaged during the December 1999 floods and mudslides that affected much of the region. The city hosts its own professional baseball team in the Venezuelan Professional Baseball League, the Tiburones de La Guaira. They have won seven national championships since their founding in 1962. History After the founding of Caracas by Spanish in 1567, toward the turn of the 16th century, the Port of La Guaira emerged on the coast and, since that time, has been the gateway to Caracas. This coastal city, almost without land to develop and bathed by the Caribbean Sea, became an important harbour during the 18th century. Attacked by buccaneers and by the English, Dutch, and French armadas, La Guaira was transformed into a fortified, walled city. During the Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
