Ramsden Jesse Ramsden was an 18th century English designer and manufacturer of mathematical and astronomical instruments. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Ramsden Biography of Jesse Ramsden (17351800) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Biografia De Ramsden, Jesse Reportajes. Los protagonistas de la actualidad. Ramsden, Jesse (Salterhebble, 1735Brighton, 1800) Mec nico brit nico. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Ramsden, Jesse Encyclop Dia Britannica Ramsden, Jesse British pioneer in the design of precision tools. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Ramsden Jesse Ramsden was an 18th century English designer and manufacturer of Jesse Ramsden, the son of a Yorkshire innkeeper, was born on October 6, 1735. http://chem.ch.huji.ac.il/~eugeniik/history/ramsden.html
Extractions: Jesse Ramsden was an 18th century English designer and manufacturer of mathematical and astronomical instruments. He is best known for the design of a telescope and microscope eyepiece (ocular) still commonly used today and bearing his name. He also designed electrostatic machines. Jesse Ramsden, the son of a Yorkshire innkeeper, was born on October 6, 1735. At the age of 16 he was apprenticed to a cloth worker, but in the long run, the textile industry did not interest Ramsden. At the age of 23 he apprenticed himself to a mathematical instrument maker in London and in a very short time, Ramsden demonstrated that he was brilliant and skillful designer of instruments. In just four years, at the age of 27, he started his own business in London in the Haymarket, then moved to 199 Piccadilly in 1775, once his reputation had been established. Ramsden soon became acknowledged as the best designer and manufacturer of mathematical, astronomical, surveying and navigational instruments in England. A few years later he married Sarah Dollond, the youngest sister of Peter Dollond. Ramsden's inventive genius led to the development of a new universal equatoreal, two new micrometers, and a new construction of eyeglasses. A telescopic eyepiece of his design is still used today. But his most important and well-known invention was a new engine for dividing mathematical instrument scales. Ramsden designed instruments of great accuracy. These included instruments to divide circles and straight lines, sextants, and vertical circles for astronomical observatories. By 1789 he and his workmen had constructed nearly a thousand sextants. He made important improvements in theodolites and transits, invented a pyrometer to measure thermal expension, and a device for determining telescopic powers. He also built barometers, manometers, assay balances, and other instruments.
Sph Ra Issue No. 8 Article 5 however, is a response to Ramsden's communication and is headed 'An answer to a paper presented to the Royal Society by Mr Jesse Ramsden F. R http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Jesse Ramsden: Information From Answers.com Jesse ramsden jesse Ramsden ( October 6 , 1735 November 5 , 1800 ) was anEnglish astronomical instrument maker. http://www.answers.com/topic/jesse-ramsden
Extractions: showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Jesse Ramsden Wikipedia Jesse Ramsden Jesse Ramsden October 6 November 5 ) was an English astronomical instrument maker. Ramsden was born at Salterhebble near Halifax, England . After serving his apprenticeship with a cloth-worker in Halifax, he went in to London , where in he was apprenticed to a mathematical instrument maker. About four years afterwards he started business on his own account and secured a great reputation with his products. He died at Brighton Ramsden's speciality was divided circles, which began to supersede the quadrants in observatories towards the end of the 18th century. His most celebrated work was a 5-feet vertical circle, which was finished in 1789 and was used by Giuseppe Piazzi at Palermo in constructing his catalogue of stars. He was the first to carry out in practice a method of reading off angles (first suggested in 1768 by the duke of Chaulnes) by measuring the distance of the index from the nearest division. line by means of a micrometer screw which moves one or two fine threads placed in the focus of a microscope. Ramsden's transit instruments were the first which were illuminated through the hollow axis; the idea was suggested to him by Prof. Henry Ussher in
Psych Central - Jesse Ramsden Enpsychlopedia Jesse ramsden jesse Ramsden (October 6, 1735 November 5, 1800) was an English astronomical instrument maker. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Encyclopedia Jesse Ramsden Encyclopedia Jesse Ramsden. Sponsored links Jesse Ramsden (October 6, 1735 November 5, 1800) was an English astronomical instrument maker. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126
Jesse Ramsden - Wikipedia, The Free Encyclopedia Jesse Ramsden (October 6, 1735 November 5, 1800) was an English astronomical Ramsden s speciality was divided circles, which began to supersede the http://en.wikipedia.org/wiki/Jesse_Ramsden
Extractions: The Red Cross and other charities also need your help. Jesse Ramsden October 6 November 5 ) was an English astronomical instrument maker. Ramsden was born at Salterhebble near Halifax, England . After serving his apprenticeship with a cloth-worker in Halifax, he went in to London , where in he was apprenticed to a mathematical instrument maker. About four years afterwards he started business on his own account and secured a great reputation with his products. He died at Brighton Ramsden's speciality was divided circles, which began to supersede the quadrants in observatories towards the end of the 18th century. His most celebrated work was a 5-feet vertical circle, which was finished in 1789 and was used by Giuseppe Piazzi at Palermo in constructing his catalogue of stars. He was the first to carry out in practice a method of reading off angles (first suggested in 1768 by the duke of Chaulnes) by measuring the distance of the index from the nearest division. line by means of a micrometer screw which moves one or two fine threads placed in the focus of a microscope. Ramsden's transit instruments were the first which were illuminated through the hollow axis; the idea was suggested to him by Prof. Henry Ussher in
IMSS - Multimedia Catalogue - Biographies - Jesse Ramsden Jesse Ramsden. 17351800 One of the most famous Englishscientific-instrument makers of the second half of the eighteenth century. http://brunelleschi.imss.fi.it/genscheda.asp?appl=SIM&xsl=biografia&lingua=ENG&c
Meteorbe - Explication Baromètre Translate this page ramsden jesse, 1735 - 1800, Inventeur, Angleterre. Mégnié Pierre, 1751 - 1807,Inventeur, France. Fortin Nicolas, 1750 - 1831, Physicien, ingénieur, France http://www.meteorbe.com/Explication barometre.htm
Extractions: Le baromètre Définition : La baromètre est un appareil météorologique qui permet de mesurer la pression atmosphérique. La pression atmosphérique est la colonne d'air (mélange de plusieurs gaz) qui se situe tout autour de nous et qui s'étant du sol jusqu'à la limite supérieure de l'atmosphère, soit aux environs de 600 kilomètres d'altitude. Explications : Comment ça fonctionne ? La pression atmosphérique, quasiment imperceptible pour l'homme, est très liée à l'évolution des conditions météorologiques. En effet, une haute pression indique que l'on se situe dans un système anticyclonique (signe de beau temps) alors qu'une basse pression indique que l'on se situe dans un système dépressionnaire (signe de mauvais temps). On estime que la barrière, entre ces deux systèmes, se situe à environ 1013 hPa. Si le baromètre est au dessus, il fera donc plutôt beau temps et s'il se situe en dessous, il fera plutôt mauvais temps. C'est quoi le hPa ? Le hPa est l'abréviation de "hectopascal". Il s'agit d'une unité de mesure que l'on utilise en météorologie pour exprimer la pression atmosphérique. Pour faire compliqué, on peut dire que 1 hectopascal correspond à une masse de 1,013 grammes sur une surface de
Extractions: Als Händler und Sammler kommt man zudem gelegentlich in die Situation ein solches Instrument beurteilen und datieren zu müssen. Dann ist es gut zu wissen, wo entsprechende Hintergrundinformationen und Vergleichsfotos zu finden sind. Deshalb habe ich für Sie in meinem Urlaub alle meine "Foto-Bücher" (!) durchgesehen und kann Ihnen heute eine Aufstellung der frühen "Barometermaker" und ihrer aus der Literatur bekannten Instrumente mit Quellenangabe präsentieren. Damit Sie sich zukünftig rasch und stressfrei informieren können, selbstverständlich mit allen Querverweisen. Gleichzeitig werde ich von Zeit zu Zeit, mir bekannte Internet-Adressen (Museen, Sammlungen und Händler) besuchen und dort ebenfalls nach frühen Quecksilberbarometern (vor ~1800) fahnden. Auch diese Bilder werden dann im Interesse der Barometrie in die eigens dafür eingerichtete neue Tabelle eingefügt, in der Hoffnung, dass es mir die Urheber bitte nachsehen werden. Soll es doch zugleich auch eine Würdigung ihrer Arbeit sein. Wir bekommen dann auf diese Weise eine Tabelle mit den aktuellen Highlights für den "barophilen Feinschmecker" und mit der Zeit eine Erweiterung des Bucharchivs.
Extractions: Home Browse Newsletters Store ... Subscribe Already a member? Log in Content Related to this Topic This Article's Table of Contents Jesse Ramsden Print this Table of Contents Shopping Price: USD $1495 Revised, updated, and still unrivaled. The Official Scrabble Players Dictionary (Hardcover) Price: USD $15.95 The Scrabble player's bible on sale! Save 30%. Merriam-Webster's Collegiate Dictionary Price: USD $19.95 Save big on America's best-selling dictionary. Discounted 38%! More Britannica products Ramsden, Jesse Ramsden, Jesse... (75 of 129 words) var mm = [["Jan.","January"],["Feb.","February"],["Mar.","March"],["Apr.","April"],["May","May"],["June","June"],["July","July"],["Aug.","August"],["Sept.","September"],["Oct.","October"],["Nov.","November"],["Dec.","December"]]; To cite this page: MLA style: "Ramsden, Jesse."
Encyclopedia Of Astronomy And Astrophysics » Browse By Title Article ramsden, jesse (17351800); Published November 2000; SummaryInstrumentmaker, born in Halifax, Yorkshire, England, the most outstanding maker of http://eaa.iop.org/index.cfm?action=browse.home&type=ti&dir=R/RA
Ramsden Biography of jesse ramsden (17351800) jesse ramsden s father was Thomasramsden who was an innkeeper. The family were not well off and jesse attended a http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Ramsden.html
Extractions: Version for printing Jesse Ramsden 's father was Thomas Ramsden who was an innkeeper. The family were not well off and Jesse attended a free school in Halifax from 1744 to 1747. At this stage Ramsden was sent to live with his uncle, Mr Craven, in the North Riding of Yorkshire, and he spent four years there studying mathematics taught by the Revd Mr Hall. Around 1751 he was apprenticed to a cloth maker, and he spent until 1755 serving his apprenticeship. He went to London at this stage and was given a job as a clerk in a cloth warehouse but, in 1756 at the age of 21, he chose to become an apprentice to Mark Burton, a mathematical instrument maker in Denmark Street in the Strand. By the age of 27 he had his own business in London in the Strand where he became acknowledged as the most skilful designer of mathematical, astronomical, surveying and navigational instruments in the 18th century. A near neighbour was John Dollond, a fellow of the Royal Society and a skilled designer of optical instruments. Ramsden spent much time at Dollond's house learning about optical instruments. There he met Sarah Dollond, John Dollond's daughter, and they were married on 16 August 1766. Of their two sons and two daughters, only one son, John Ramsden, survived to adulthood. Marriage gave Ramsden a share in the patent that John Dollond had taken out on his most famous invention, the achromatic lens. Ramsden soon opened a new business in Haymarket, near Little Suffolk Street.
