1. Ramsden Jesse Ramsden. Jesse Ramsden was apprenticed to a cloth maker, but at the ageof 23 he chose to become an apprentice to a mathematical instrument maker. http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Ramsden.html

Jesse Ramsden Born: 15 Oct 1735 in Halifax, Yorkshire, England Died: 5 Nov 1800 in Brighton, Sussex, England Click the picture above to see a larger version Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Jesse Ramsden was apprenticed to a cloth maker, but at the age of 23 he chose to become an apprentice to a mathematical instrument maker. By the age of 27 he had his own business in London where he became acknowledged as the most skilful designer of mathematical, astronomical, surveying and navigational instruments in the 18 th Century. The French scientist N Cassegrain proposed a design of a reflecting telescope in 1672. It was Ramsden, however, 100 years later who found that this design reduces blurring of the image caused by the sphericity of the lenses or mirrors. He was elected Fellow of the Royal Society (1786) and received the Copley Medal in 1795. Article by: J J O'Connor and E F Robertson List of References (3 books/articles) Mathematicians born in the same country Honours awarded to Jesse Ramsden (Click a link below for the full list of mathematicians honoured in this way) Lunar features Crater Ramsden Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index History Topics Societies, honours, etc.

2. Ramsden Jesse Ramsden b. October 6, 1735, Halifax, Yorkshire, England d. November5, 1800, Brighton, Sussex. Jesse Ramsden was an 18th century http://chem.ch.huji.ac.il/~eugeniik/history/ramsden.html

Jesse Ramsden b. October 6, 1735, Halifax, Yorkshire, England d. November 5, 1800, Brighton, Sussex 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.

3. Ramsden Tellmeabout.co.uk ramsden jesse Ramsden. We. Jesse Ramsden Encyclop¦dia Britannica Encyclop¦diaBritannica, Ramsden, Jesse Encyclop¦dia Britannica Article. http://www.tellmeabout.co.uk/directory/r/ramsden/readme.htm

4. Ramsden Family Crest By Houseofnames.com Some noteworthy people of the name ramsden jesse Ramsden (17351800) English instrument-maker.Copyright © 2000 - 2004 Swyrich Corporation, all rights reserved. http://www.houseofnames.com/xq/asp.familycrest_details/s.Ramsden/Ramsden_family_

Where did the name Ramsden come from? What is their family crest? When did they first arrive in the United States? Where did the various branches of the family go? Family Crests > Ramsden Family Crest Ramsden Family Crest Ramsden Origin Displayed: English Spelling variations include: Ramsden, Ramsdon and others. First found in Lancashire where they were seated from early times and their first records appeared on the early census rolls taken by the early Kings of Britain to determine the rate of taxation of their subjects. Some of the first settlers of this name or some of its variants were: Margaret Ramsden settled with her husband in the Barbados in 1665; John Ramsden settled in Virginia in 1642; Mary Ramsden and her husband and four children arrived in Philadelphia in 1820. (Above is a small excerpt from our 1800 word history) Motto Translated: A change of skies does not change the mind. Some noteworthy people of the name Ramsden Jesse Ramsden (1735-1800) English instrument-maker Tell Me More About Family Crests Family Crests and Coats of Arms: the Heraldic Artist We have researched the Ramsden family crest in the most recognized sources of coats of arms. Before an artist or craftsman can render a Coat of Arms, it must exist. In other words the arms must have been designed and recorded by the heralds from time immemorial.

5. Meteorbe - Explication Baromètre Translate this page Gay-Lussac Louis Joseph, 1778 - 1850, Physicien, chimiste, France. ramsden jesse,1735 - 1800, Inventeur, Angleterre. Mégnié Pierre, 1751 - 1807, Inventeur, France. http://www.meteorbe.com/Explication barometre.htm

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

6. Ramsden J. ramsden jesse. Great Britain. Born on 06.10.1735. Died on 05.11.1800. Mathematician,mechanician, optician. Honorary Member since 04.04.1793. http://hp.iitp.ru/eng/23/2342.htm

RAMSDEN Jesse Great Britain. Born on 06.10.1735. Died on 05.11.1800. Mathematician, mechanician, optician. Honorary Member since 04.04.1793.

7. Foreign Members (main02) Translate this page 1793 Aubert Alexandre (Great Britain). 1793 ramsden jesse (Great Britain).1793 Pfaff Johann Friedrich (Germany). 1793 Trembley Jean (Switzerland). http://hp.iitp.ru/eng/gallery/fm_ma02.htm

Foreign Members of the Academy Poniatovskii Stanislav Avgust, king (Poland) Gustav III, king (Sweden) Bossut Charles, abbot (France) Camper Petrus (Netherlands) Magelhaens (Magellan) Joso Hiacintho de (Great Britain) Tronchin Theodore (France) Patrin Eugene-Louis-Melchior (France) Banks Joseph sir, baronet (Great Britain) Holbach Paul-Henri Dietrich, baron de (France) Jacquin Nicolaus Joseph von (Austria) Moehring Paul Heinrich Gerhard (Germany) Pristley Joseph (Great Britain) Forster Johann Reinhold (Germany) Friedrich Wilhelm II, ñrown prince (Germany) Galiani Ferdinando don, abbot (Italy) L'Huiller Simon-Antoine-Jean (Switzerland) Black Joseph (Great Britain) Robertson William (Great Britain) Ferber Ivan Yakovlevich (Iogann Yakob) (Sweden) Pacassi Johann Baptiste, baron (Austria) Koenig Johann Gerhard (Georg) (Denmark) Vivenzio Giovanni (Italy) Rochon Alexis-Marie de, abbot (France) Bode Johann Elert (Germany) Zimmermann Johann Georg (Great Britain) Soulavie Jean-Louis-Giraud (France) Carosi Johann Philippe (Poland) Germann Ivan Filippovich (Franz Iogann Benedikt) (Austria) Kastner Abraham Gotthelf (Germany) Krell Lorenz (Florenz) Friedrich, von (Germany)

8. Jesse Ramsden --  Encyclopædia Britannica Sextant, brass, by jesse ramsden, c. 1770. In the Adler Planetarium and MLA style " jesse ramsden." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service http://www.britannica.com/eb/article?eu=64206

9. Ramsden Observatory ramsden Observatory. Welcome to ramsden Observatory! ramsden Observatory is located on Earth's Moon, in the center of Sinus Medii (literally "The Bay of the Center"), at Lunar geographical coordinates 0 degrees North, 0 degrees East. named for the British mathematician jesse ramsden, who showed that Cassegrain's design http://www.lpl.arizona.edu/~schaller/JC

Ramsden Observatory Welcome to Ramsden Observatory! Ramsden Observatory is located on Earth's Moon, in the center of Sinus Medii (literally "The Bay of the Center"), at Lunar geographical coordinates degrees North, degrees East. This location is the Moon's sub-terrestrial point ). The Observatory is named for the British mathematician Jesse Ramsden , who showed that Cassegrain's design for a reflecting telescope reduces the spherical aberration introduced by curved lenses and mirrors( Ramsden Observatory is owned and operated by the Intersettlement Geographic Society, the 23rd century descendant of the National Geographic Society that was founded on January 27, 1888, in the city of Washington DC, the capital of the old, pre-CEGA United States of America. Beginning in the late 21st century, the Society used the Observatory to monitor conditions on Earth during the 100 years of chaos commonly referred to as "The Fall." Today, the Ramsden Observatory continues to study the Earth from afar, under the watchful eyes of the Central Earth Government and Administration. The Observatory welcomes visitors with open arms; there is nothing more beautiful in the entire Solar System than the Homeworld hovering directly overhead! Location An image of Sinus Medii, taken from Earth, showing the location of Ramsden Observatory. For a low resolution image of the local region, including the East Rim of Copernicus Crater 650 km to the northwest, click

10. Series 81.01 Invoice Issued To Banks By Jesse Ramsden, Optician And Instrument M Invoice issued to Banks by jesse ramsden, optician and instrument maker, 20 May 1788 (Series 81.01) Notes Includes receipt issued to Banks by jesse ramsden, 29 May 1788. Author ramsden, jesse, 17351800. Date 20, 29 May 1788. Series title http://www.sl.nsw.gov.au/banks/series_81/81_01.htm

Invoice issued to Banks by Jesse Ramsden, optician and instrument maker, 20 May 1788 (Series 81.01) Notes: Includes receipt issued to Banks by Jesse Ramsden, 29 May 1788 Author: Ramsden, Jesse, 1735-1800 Date: 20, 29 May 1788 Series title: Series 81: Miscellaneous invoices and receipts, 1788-1805 Frame numbers: CY 3683 / 500 CY 3683 / 501 CY 3683 / 502 Subjects: Opticians - England

11. John Hunter (www.whonamedit.com) With the aid of jesse ramsdens (17341800) delicate thermometer he discovered the significance of the the nineteenth century. ramsden, jesse. During the next four years Hunter http://www.whonamedit.com/doctor.cfm/84.html

Home List categories Eponyms A-Z Biographies by country ... Contact Whonamedit.com does not give medical advice. This survey of medical eponyms and the persons behind them is meant as a general interest site only. No information found here must under any circumstances be used for medical purposes, diagnostically, therapeutically or otherwise. If you, or anybody close to you, is affected, or believe to be affected, by any condition mentioned here: see a doctor. John Hunter Scottish anatomist and surgeon, born February 13, 1728, Long Calderwood, East Kilbride, Lanarkshire, Scotland; died October 16, 1793, London, England. Associated eponyms: Addison-Biermer disease Historic term for pernicious anaemia or megaloblastic anaemia, secondary to vitamin B12 deficiency. Hunter's canal (John Hunter) Canalis adductorius. The adductor canal. Hunter's chancre (John Hunter) A firm, elevated papule of the penis, vulva, or cervix in primary syphilis. Biography: John Hunter is considered one of the greatest anatomists of all time and the founder of experimental pathology in England. Hunter put the practice of surgery on a scientific foundation and laid the framework for the twentieth century developments. His saying "Don't think, try the experiment" has inspired generations of modern surgeons. Growing up on the farm Hunter, youngest of the ten children of John and Agnes Hunter, - the «Hunters of Hunterstown» - as the small settlement of Long Calderwood, near Glasgow, belonged to the Hunters. The house bears a tablet to the effect that he was born on February 13th, 1728. In his life-time the birthday was kept Februar 14th, on which date one drinks to his memory at the Royel College of Surgeons of England. He was probbaly born so late at night that in the hurry-scurry the midwife failed to notice whether he appeared just before or just after the clock struck 12.

12. Ramsden Portrait jesse ramsden. JOC/EFR September 2003 The URL of this page is © Copyright information.http//wwwhistory.mcs.st-andrews.ac.uk/PictDisplay/ramsden.html. http://www-gap.dcs.st-and.ac.uk/~history/PictDisplay/Ramsden.html

Jesse Ramsden JOC/EFR September 2003 The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/PictDisplay/Ramsden.html

13. JESSE RAMSDEN ramsden, jesse (1 7351800), English astronomical instrument maker, was born at Salterhebble near Halifax, Yorkshire, on the 6th of October 1735. After http://www.1911encyclopedia.org/R/RA/RAMSDEN_JESSE.htm

JESSE RAMSDEN RAMSDEN, JESSE RAMSBOTTOM RAMSEY

14. Jesse Ramsden (1735-1800) jesse ramsden (17351800) This is a biographical sketch of jesse ramsden. jesse ramsden was an eighteenth century English designer and manufacturer of mathematical and astronomical instruments. He http://rdre1.inktomi.com/click?u=http://micro.magnet.fsu.edu/optics/timeline/peo

15. Burkett, Jesse Cail --  Britannica Student Encyclopedia 84 and 1987–88). , ramsden, jesse British pioneer in the design ofprecision tools. More results . 63 Student Encyclopedia Britannica http://www.britannica.com/ebi/article?eu=334246&query=baseball hall of fame&ct=e

16. Antique Telescope By Jesse Ramsden 18th Century Telescope by jesse ramsden. This is a great example of a late 18th century telescope by the famous instrument maker jesse ramsden. He was born in Halifax in 1731 and he died in Brighton http://www.btinternet.com/~hubbletelescope/ramsden.shtml

th Century Telescope by Jesse Ramsden This is a great example of a late 18th century telescope by the famous instrument maker Jesse Ramsden. He was born in Halifax in 1731 and he died in Brighton in 1800. All of his work is of the highest standard, which is evident when using this telescope. The achromatic objective lens is shown above in its brass surround. This unscrews using the knurled ring to allow access to the back of the glass for cleaning. Ramsden employed over 50 men, but he was said to have undertaken the construction of the most delicate instruments himself. The telescope is made of brass and mahogany. These were typical telescope making materials from the 18th century, especially for marine use. The photograph above shows the barrel, and the screws that attach the wood to the brass. At the front there are four screws, and at the opposite end of the barrel there are six screws. Not only is this telescope in superb working order, it also has its original leather case. I believe that it is original as it fits so well and slides in and out very smoothly. The eyepiece end of the telescope is shown in the two photographs above . The protective shutter rotates around a pivot and does not slide along straight tracks. The eyepiece design employed is known as the "Ramsden" as it was developed by Ramsden earlier in his life. A variation of Ramsden style eyepieces, the Kellner, is still used in telescopes today.

17. JESSE RAMSDEN ramsden, jesse (1,7351800), English astronomical instrument maker, was born at Salterhebblenear Halifax, Yorkshire, on the 6th of October 1735. jesse ramsden. http://36.1911encyclopedia.org/R/RA/RAMSDEN_JESSE.htm

JESSE RAMSDEN RAMSDEN, JESSE RAMSBOTTOM RAMSEY

18. Biografia De Ramsden, Jesse Translate this page ramsden, jesse. (Salterhebble, 1735-Brighton, 1800) Mecánico británico.Se dedicó a la construcción y al perfeccionamiento de http://www.biografiasyvidas.com/biografia/r/ramsden.htm

Inicio Buscador Utilidades Recomendar sitio Enlaces Ramsden, Jesse (Salterhebble, 1735-Brighton, 1800) Mecánico británico. Se dedicó a la construcción y al perfeccionamiento de instrumentos de precisión, tales como anteojos, teodolitos y círculos graduados. Inventó una máquina electrostática, un dinamómetro y el ocular compuesto que lleva su nombre, formado por dos lentes planoconvexas iguales, separadas por una distancia igual a su distancia focal. Inicio Buscador Recomendar sitio

19. Molecular Expressions: Science, Optics And You - Timeline - Jesse Ramsden jesse ramsden was an eighteenth century English designer and manufacturerof mathematical and astronomical instruments. jesse ramsden (17351800). http://www.microscopy.fsu.edu/optics/timeline/people/ramsden.html

Visit the Molecular Expressions Website Galleria Photo Gallery ... Home Jesse Ramsden Jesse Ramsden was an eighteenth century English designer and manufacturer of mathematical and astronomical instruments. He is best known for the design of a telescope and microscope eyepiece (ocular) that bears his name and is still commonly used today. Born in Yorkshire, England, on October 6, 1735, Ramsden was the son of an innkeeper. As a young boy, Ramsden was apprenticed to a cloth worker, but in the long run, the textile industry did not interest him. At the age of 23 he apprenticed himself to a mathematical instrument maker and, in a very short time, Ramsden demonstrated that he was a brilliant and skillful designer of instruments. In just four years, he started his own business in London. Ramsden soon became acknowledged as the best designer and manufacturer of mathematical, astronomical, surveying and navigational instruments in England. Ramsden designed instruments of great accuracy, largely due to his invention of the dividing engine. Prior to his creation of the device, the division and inscription of scales on mathematical instruments was done by hand, but Ramsden's divider eliminated the risk of human error and made it feasible to inscribe lines accurate to a second of an arc. Due to the precision he could obtain, Ramsden's instruments were in great demand and he furnished achromatic telescopes equipped with accurately divided circles to many European observatories. Insisting on only the highest quality was problematic at times, however, since Ramsden had a reputation for completing the orders of his customers belatedly.

20. Strumenti Astronomici - TEODOLITE EQUATORIALE - Astronomic Instruments - Jesse R Translate this page jesse ramsden, (Salterhebble 1735 - Brighton 1800), fisico britannicoe uno dei più importanti artigiani inglesi del sec. XVIII http://www.sullacrestadellonda.it/strumenti/strumenti_astro_teodequat.htm

Teodolite equatoriale Un aspetto interessante dell'industria inglese produttrice di strumenti scientifici fu la comparsa, alla metà del Settecento, di grandi officine, che costruivano strumenti utilizzati in tutti i campi della ricerca scientifica. Scompare perciò la figura dell'artigiano, sostituita da quella dell'industriale e dell'operaio specializzato, mentre si differenziano le figure del tecnico e dello scienziato. Jesse Ramsden , (Salterhebble 1735 - Brighton 1800), fisico britannico e uno dei più importanti artigiani inglesi del sec. XVIII, fu attivo nei campi più disparati: costruttore di dispositivi di precisione, realizzò un micrometro filare utilizzato negli archi di misura dei sestanti e delle circonferenze geodetiche. Realizzò macchine a dividere e bilance di precisione , perfezionò strumenti ottici e teodoliti e costruì una macchina elettrostatica a strofinio. Divenne famoso soprattutto a partire dal 1770, quando cominciò a costruire strumenti astronomici. L'Istituto Idrografico della Marina conserva un teodolite equatoriale da campagna prodotto dopo il 1780 dal Ramsden, che modificò un esemplare descritto dal Van Short nel 1749. E' uno strumento per osservazioni astronomiche, con montatura altazimutale ed equatoriale, che consente la misurazione dell'ascensione retta e della declinazione delle stelle. PREFAZIONE COSTRUTTORI DI STRUMENTI GLOSSARIO ... INDICE Courtesy by

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