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1775 In Science
The year 1775 in science and technology involved some significant events. Biology * The cheetah (''Acinonyx jubatus'') is described. Chemistry * May 25 – Joseph Priestley's account of his isolation of oxygen in the form of a gas ("dephlogisticated air") is read to the Royal Society of London. * Torbern Bergman's ' ("A Dissertation on Elective Attractions") is published, containing the largest tables of chemical affinity ever published. Exploration * July 30 – 3-year second voyage of James Cook completed, the first eastabout global circumnavigation, during which the Antarctic Circle has been crossed three times, ''Terra Australis'' shown to be a myth, and Larcum Kendall's K1 chronometer demonstrated to be a reliable timekeeper for the purpose of calculating longitude. Mathematics * Lagrange's '' Recherches d'Arithmétique'' develops a general theory of binary quadratic forms. *First Stanhope Demonstrator, a mechanical device to demonstrate and solve problems in logic, is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longitude
Longitude (, ) is a geographic coordinate that specifies the east- west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Meridians are imaginary semicircular lines running from pole to pole that connect points with the same longitude. The prime meridian defines 0° longitude; by convention the International Reference Meridian for the Earth passes near the Royal Observatory in Greenwich, south-east London on the island of Great Britain. Positive longitudes are east of the prime meridian, and negative ones are west. Because of the Earth's rotation, there is a close connection between longitude and time measurement. Scientifically precise local time varies with longitude: a difference of 15° longitude corresponds to a one-hour difference in local time, due to the differing position in relation to the Sun. Comparing local time to an absol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Specola
The Museum of Zoology and Natural History, best known as La Specola, is an eclectic natural history museum in Florence, central Italy, located next to the Pitti Palace. The name '' Specola'' means observatory, a reference to the astronomical observatory founded there in 1790. It now forms part of the Museo di Storia Naturale di Firenze. This museum is part of what are now six different collections at four different sites for the Museo di Storia Naturale di Firenze. History The museum has deep ties with history; parts of the collection can be traced back to the Medici Family. It is known for its collection of wax anatomical models from the 18th century. It is the oldest scientific Museum of Europe. This museum is located in the former Palazzo Torrigani at Via Romana 17, near the Pitti Palace. The Imperial Regio Museo di Fisica e Storia Naturale (The Imperial-Royal Museum for Physics and Natural History) was founded in 1771 by Grand Duke Peter Leopold to display publicly the larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attention Deficit Hyperactivity Disorder
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by symptoms of inattention, hyperactivity, impulsivity, and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and Developmental psychology, developmentally inappropriate. ADHD symptoms arise from executive dysfunction. Impairments resulting from deficits in self-regulation such as time management, Cognitive inhibition, inhibition, task initiation, and sustained attention can include poor professional performance, relationship difficulties, and numerous health risks, collectively predisposing to a diminished Quality of life (healthcare), quality of life and a reduction in life expectancy. As a consequence, the disorder costs society hundreds of billions of US dollars each year, worldwide. It is associated with other mental disorders as well as non-psychiatric disorders, which can cause additional impairment. While ADHD involves a lack of su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Der Philosophische Arzt
''Der Philosophische Arzt'' is a medical publication published in the late 18th century by Melchior Adam Weikard, a prominent German physician and philosopher to the Russian Empress, Catherine II. The first edition of ''Der Philosophische Arzt'' was first published in 1775, but was written perhaps as early as 1770. It was initially published anonymously as was the second edition, though it was widely believed that Weikard was the author. The reason for doing so is unclear but was probably due to anticipated critical reactions to its publication from several sources. A principal one was the Prince-Bishop of Fulda, to whom Weikard served as physician and in a Catholic The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ... region where Weikard worked as a spa doctor being supported ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melchior Adam Weikard
Melchior Adam Weikard was born on April 27, 1742, near Fulda Germany. He was a physician and a philosopher. Weikard wrote the earliest reference to the behavioral disorder attention deficit hyperactivity disorder (ADHD). He was progressive for his time, believing that illnesses have physical causes and that they are not a result of moral wrongs or the spiritual influences. Weikard died near his birthplace on July 25, 1803. Early life Weikard grew up around Fulda and, at the age of six, developed a spinal deformity. In secondary school, at the Frobenius-Gymnasium in Hammelburg, Weikard studied in the modern-day equivalent of the STEM program. Weikard then went on to study physics, philosophy, and medicine at the University of Würzburg. He did not have kind things to say about his education. Weikard was nearsighted, physically deformed, and missed two years of school which made his experience arduous. Weikard claimed to have teachers who taught out of date material in secondary s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epidemiology
Epidemiology is the study and analysis of the distribution (who, when, and where), patterns and Risk factor (epidemiology), determinants of health and disease conditions in a defined population, and application of this knowledge to prevent diseases. It is a cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying Risk factor (epidemiology), risk factors for disease and targets for preventive healthcare. Epidemiologists help with study design, collection, and statistical analysis of data, amend interpretation and dissemination of results (including peer review and occasional systematic review). Epidemiology has helped develop methodology used in clinical research, public health studies, and, to a lesser extent, basic research in the biological sciences. Major areas of epidemiological study include disease causation, transmission (medicine), transmission, outbreak investigation, disease surveillance, environmental epidemiology, forensic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cancer
Cancer is a group of diseases involving Cell growth#Disorders, abnormal cell growth with the potential to Invasion (cancer), invade or Metastasis, spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible Signs and symptoms of cancer, signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in defecation, bowel movements. While these symptoms may indicate cancer, they can also have other causes. List of cancer types, Over 100 types of cancers affect humans. Tobacco use is the cause of about 22% of cancer deaths. Another 10% are due to obesity, poor Diet (nutrition), diet, sedentary lifestyle, lack of physical activity or Alcohol abuse, excessive alcohol consumption. Other factors include certain infections, exposure to ionizing radiation, and environmental pollutants. infectious causes of cancer, Infection with specific viruses, bacteria and parasites is an environmental factor cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percivall Pott
Percivall Pott (6 January 1714, in London – 22 December 1788) was an English surgeon, one of the founders of orthopaedics, and the first scientist to demonstrate that cancer may be caused by an environmental carcinogen, namely chimney sweeps' carcinoma. Many diseases are his namesake including Pott's fracture, Pott's disease of the spine, and Pott's puffy tumour. It is believed that Pott's standard of living contributed to the rise of the surgeon within social standings. Early life and education Percivall Pott was born the son of Percivall Pott senior in London. His father died when he was a child, but Joseph Wilcocks, Bishop of Rochester, who was a relative of his mother, paid for his education. He served his apprenticeship with Edward Nourse, assistant surgeon to St Bartholomew's Hospital, and in 1736 was admitted to the Barbers' Company and licensed to practice. Career He became assistant surgeon to St Bartholomew's in 1744 and full surgeon from 1749 till 1787. As t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific American
''Scientific American'', informally abbreviated ''SciAm'' or sometimes ''SA'', is an American popular science magazine. Many scientists, including Albert Einstein and Nikola Tesla, have contributed articles to it, with more than 150 Nobel Prize-winners being featured since its inception. In print since 1845, it is the oldest continuously published magazine in the United States. ''Scientific American'' is owned by Springer Nature, which is a subsidiary of Holtzbrinck Publishing Group. History ''Scientific American'' was founded by inventor and publisher Rufus Porter (painter), Rufus Porter in 1845 as a four-page weekly newspaper. The first issue of the large-format New York City newspaper was released on August 28, 1845. Throughout its early years, much emphasis was placed on reports of what was going on at the United States Patent and Trademark Office, U.S. Patent Office. It also reported on a broad range of inventions including perpetual motion machines, an 1860 devi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Stanhope, 3rd Earl Stanhope
Charles Stanhope, 3rd Earl Stanhope, aka Charles Mahon, 3rd Earl Stanhope, FRS (3 August 175315 December 1816), was a British statesman, inventor, and scientist. He was the father of Lady Hester Stanhope and brother-in-law of William Pitt the Younger. He is sometimes confused with an exact contemporary of his, Charles Stanhope, 3rd Earl of Harrington. Early life The son of Philip Stanhope, 2nd Earl Stanhope, he was educated at Eton and the University of Geneva. While in Geneva, he devoted himself to the study of mathematics under Georges-Louis Le Sage, and acquired from Switzerland an intense love of liberty. Politics In politics he was a democrat. As Lord Mahon he contested the Westminster without success in 1774, when only just of age; but from the general election of 1780 until his accession to the peerage on 7 March 1786 he represented through the influence of Lord Shelburne the Buckinghamshire borough of High Wycombe. During the sessions of 1783 and 1784 he suppor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanhope Demonstrator
The Stanhope Demonstrator was the first machine to solve problems in logic. It was designed by Charles Stanhope, 3rd Earl Stanhope to demonstrate consequences in logic symbolically. The first model was constructed in 1775. It consisted of two slides coloured red and gray mounted in a square brass frame. This could be used to demonstrate the solution to a syllogistic type of problem in which objects might have two different properties and the question was how many would have both properties. Scales marked zero to ten were used to set the numbers or proportions of objects with the two properties. This form of inference anticipated the numerically definite syllogism which Augustus De Morgan laid out in his book, ''Augustus_De_Morgan#Formal_Logic, Formal Logic'', in 1847. Construction The device was a brass plate about four inch, inches square which was mounted on a piece of mahogany which was three-quarters of an inch thick. There was an opening with a depression in the wood ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
