|
Peter Dollond
Peter Dollond (2 February 1731 – 2 July 1820) was an English inventor of optical instruments. He was the son of optician John Dollond. He is known for his successful optics business, and for the invention of the apochromat. Biography Dollond was born in Kensington. Working together with his father and subsequently with his younger brother and nephew ( George Dollond) he successfully designed and manufactured a number of optical instruments. He is particularly credited with the invention of the triple achromatic lens - i.e., apochromatic lens - in 1763, still in wide use today, though known as the Cooke triplet after a much later 1893 patent. Peter Dollond worked at first silk weaving with his father, but his father's passion for optics inspired him so much that in 1750 Peter quit the silk business and opened an optical instruments shop in Kennington, London. After two years, his father gave up silk, too, and joined him. Dollond telescopes, for sidereal or terrestrial us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kensington
Kensington is an area of London in the Royal Borough of Kensington and Chelsea, around west of Central London. The district's commercial heart is Kensington High Street, running on an east–west axis. The north-east is taken up by Kensington Gardens, containing the Albert Memorial, the Serpentine Gallery and John Hanning Speke, Speke's monument. South Kensington and Gloucester Road, London, Gloucester Road are home to Imperial College London, the Royal College of Music, the Royal Albert Hall, Natural History Museum, London, Natural History Museum, Victoria and Albert Museum, and Science Museum, London, Science Museum. The area is also home to many embassies and consulates. Name The Manorialism, manor of ''Chenesitone'' is listed in the Domesday Book of 1086, which in the Old English language, Anglo-Saxon language means "Chenesi's List of generic forms in place names in Ireland and the United Kingdom, ton" (homestead/settlement). One early spelling is ''Kesyngton'', as wri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Philosophical Society
The American Philosophical Society (APS) is an American scholarly organization and learned society founded in 1743 in Philadelphia that promotes knowledge in the humanities and natural sciences through research, professional meetings, publications, source text, library resources, and community outreach. It was founded by the polymath Benjamin Franklin and is considered the first learned society founded in what became the United States.Philosophical Hall, the society's headquarters and a museum, is located just east of Independence Hall in Independence National Historical Park. In 1965, in recognition of the building's history, it was designated a National Historic Landmark. The society has about 1,000 elected members. As of April 2020, 5,710 members had been inducted since its creation. Through research grants, published journals, the American Philosophical Society Museum, an extensive library, and regular meetings, the society supports a variety of disciplines in the humanitie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optician
An optician is an individual who fits glasses or contact lenses by filling a refractive prescription from an optometrist or ophthalmologist. They are able to translate and adapt ophthalmic prescriptions, dispense products, and work with accessories. There are several specialties within the field. Types Dispensing optician or ophthalmic dispenser A dispensing optician is anyone who prepares, fits, and dispenses prescription lenses, spectacles, glasses, contact lenses, or any other type of vision-correcting optical device to the intended user. They may interpret optical prescriptions issued by an ophthalmologist, optometrist, or physician for the lab optician who fabricates vision-correcting optical lenses. They also measure inter-ocular or pupillary distances, vertex distances, pupil fitting heights, and frame angles to determine the proper position of vision-correcting lenses. In addition, they adapt, modify, or align frames with vision-correcting lenses to the face of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dollond & Aitchison
Dollond & Aitchison was one of the oldest chains of retail opticians in the United Kingdom, having been established in 1750. The business was absorbed into Boots Opticians in 2009 and stores were rebranded under the Boots Opticians name, completed in 2015. History On 21 April 1750, Peter Dollond opened a small optical business in Vine Street, near Hatton Garden in London. He was joined by his father, John Dollond, in 1752. The Dollonds became notable for the quality of their optical products. In 1761 John Dollond, now a partner in the business, was appointed optician to George III of the United Kingdom, King George III and the Prince Edward, Duke of York and Albany, Duke of York and Albany. In 1781, Peter Dollond made bifocal spectacles. At The Great Exhibition 1851 in London, the Dollonds were awarded a medal for the excellence of their optical instruments. In 1889, James Aitchison established his first business in Fleet Street. In 1927 ''Dollond & Co'' merged with ''Aitchi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Lind (naturalist)
James Lind FRS FRSE FRCPE (May 17, 1736 – October 17, 1812) was a Scottish natural philosopher and physician. Life James Lind was born in Gorgie, Edinburgh on 17 May 1736. He studied medicine at Edinburgh University under William Cullen and Joseph Black, and graduated in 1768. In 1766, he then joined the East India Company as surgeon. In 1768 he received his doctorate (MD) from Edinburgh upon completing a dissertation on marsh fever (malaria) in Bengal. On 6 November 1770 he was admitted a Fellow of the College of Physicians, Edinburgh. In 1773 he was a founding member of the Aesculapian Club. Lind was also a corresponding member of the Lunar Society. Personality Lind is widely regarded as having an eccentric personality, and considered to be reckless with spending money as captured by the following dialogue: "Why, Dr. Lind, you spend a whole seas of gold", to which Lind replied, "Madam, 'tis true, my very name, behold, Begins with pounds and ends, alas, with pence" Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Jefferson
Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Independence, Declaration of Independence. Jefferson was the nation's first United States Secretary of State, U.S. secretary of state under George Washington and then the nation's second vice president of the United States, vice president under John Adams. Jefferson was a leading proponent of democracy, republicanism, and Natural law, natural rights, and he produced formative documents and decisions at the state, national, and international levels. Jefferson was born into the Colony of Virginia's planter class, dependent on slavery in the colonial history of the United States, slave labor. During the American Revolution, Jefferson represented Virginia in the Second Continental Congress, which unanimously adopted the Declaration of Independence. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick The Great
Frederick II (; 24 January 171217 August 1786) was the monarch of Prussia from 1740 until his death in 1786. He was the last Hohenzollern monarch titled ''King in Prussia'', declaring himself ''King of Prussia'' after annexing Royal Prussia from the Polish–Lithuanian Commonwealth in 1772. His most significant accomplishments include military successes in the Silesian Wars, Silesian wars, reorganisation of the Prussian Army, the First Partition of Poland, and patronage of the arts and the Enlightenment. Prussia greatly increased its territories and became a major military power in Europe under his rule. He became known as Frederick the Great () and was nicknamed "Old Fritz" (). In his youth, Frederick was more interested in music and philosophy than war, which led to clashes with his authoritarian father, Frederick William I of Prussia. However, upon ascending to the throne, he attacked and annexed the rich Habsburg monarchy, Austrian province of Silesia in 1742, winning mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leopold Mozart
Johann Georg Leopold Mozart (November 14, 1719 – May 28, 1787) was a German composer, violinist, and music theorist. He is best known today as the father and teacher of Wolfgang Amadeus Mozart, and for his violin textbook ''Versuch einer gründlichen Violinschule'' (1756). Life and career Childhood and youth He was born in Augsburg, son of Johann Georg Mozart, a bookbinding, bookbinder, and his second wife Anna Maria Sulzer. From an early age he sang as a choirboy. He attended a local Society of Jesus, Jesuit school, , where he studied logic, science, and theology, graduating ''magna cum laude'' in 1735. He studied then at the St. Salvator Lyzeum. While a student in Augsburg, he appeared in student theater productions as an actor and singer, and became a skilled violinist and organist. He also developed an interest, which he retained, in microscopes and telescopes. Although his parents had planned a career for Leopold as a Catholic priest, this apparently was not Leopold's own ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flint Glass
Flint glass is optical glass that has relatively high refractive index and low Abbe number (high dispersion). Flint glasses are arbitrarily defined as having an Abbe number of 50 to 55 or less. The currently known flint glasses have refractive indices ranging between 1.45 and 2.00. Traditionally, flint glasses were lead glasses containing around 4–60% lead(II) oxide; however, the manufacture and disposal of these glasses were sources of pollution. In many modern flint glasses, lead oxides are replaced with other metal oxides such as titanium dioxide and zirconium dioxide without significantly altering the optical properties of the glass. Applications A concave lens of flint glass is commonly combined with a convex lens of crown glass to produce an achromatic doublet lens because of their compensating optical properties, which reduces chromatic aberration (colour defects). History With respect to glass, the term ''flint'' derives from the flint nodules found in the ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Of First Refusal
Right of first refusal (ROFR or RFR) is a contractual right that gives its holder the option to enter a business transaction with the owner of something, according to specified terms, before the owner is entitled to enter into that transaction with a third party. A first refusal right must have at least three parties: the owner, the third party or buyer, and the option holder. In general, the owner must make the same offer to the option holder ''before'' making the offer to the buyer. The right of first refusal is similar in concept to a call option. A ROFR can cover almost any sort of asset, including real estate, personal property, a patent license, a screenplay, or an interest in a business. It might also cover business transactions that are not strictly assets, such as the right to enter a joint venture or distribution arrangement. In entertainment, a right of first refusal on a concept or a screenplay would give the holder the right to make that movie first while in rea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Society
The Royal Society, formally The Royal Society of London for Improving Natural Knowledge, is a learned society and the United Kingdom's national academy of sciences. The society fulfils a number of roles: promoting science and its benefits, recognising excellence in science, supporting outstanding science, providing scientific advice for policy, education and public engagement and fostering international and global co-operation. Founded on 28 November 1660, it was granted a royal charter by Charles II of England, King Charles II and is the oldest continuously existing scientific academy in the world. The society is governed by its Council, which is chaired by the society's president, according to a set of statutes and standing orders. The members of Council and the president are elected from and by its Fellows, the basic members of the society, who are themselves elected by existing Fellows. , there are about 1,700 fellows, allowed to use the postnominal title FRS (Fellow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
