Jesse Ramsden (October 6, 1735 - November 5, 1800) was an English astronomical instrument maker. October 6 is the 279th day of the year (280th in Leap years). ... Events 16 April - The London premiere of Alcina by George Frideric Handel, his first the first Italian opera for the Royal Opera House at Covent Garden. ... November 5 is the 309th day of the year (310th in leap years) in the Gregorian Calendar, with 56 days remaining. ... 1800 was a common year starting on Wednesday (see link for calendar). ... Royal motto: Dieu et mon droit (French: God and my right) Englands location within the UK Official language English de facto Capital London de facto Largest city London Area  - Total Ranked 1st UK 130,395 km² Population  - Total (2001)  - Density Ranked 1st UK 49,138,831 377/km² Religion... Astronomy is one of the few sciences where amateurs can still play an active role, especially in the discovery and monitoring of transient phenomena. ...

Ramsden was born at Salterhebble near Halifax, England. After serving his apprenticeship with a cloth-worker in Halifax, he went in 1755 to London, where in 1758 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. Halifax is a town in the county of West Yorkshire, northern England, with a population of about 90,000. ... 1755 was a common year starting on Wednesday (see link for calendar). ... The Clock Tower of the Palace of Westminster which contains Big Ben Tower Bridge at night A red double-decker bus crosses Piccadilly Circus. ... 1758 was a common year starting on Sunday (see link for calendar). ... Brighton in East Sussex is one of the largest and most famous seaside resorts in England. ...

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. Giuseppe Piazzi - Wikipedia /**/ @import /skins-1. ... Location within Italy Palermo (Palermo in Italian) (Palermu or Palemmu in Sicilian) (population 680,000) is the principal city and administrative seat of the autonomous region of Sicily, Italy. ...

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 Dublin. He published a Description of an Engine for dividing Mathematical Instruments in 1777. Dublin (Irish: Baile Átha Cliath1),is the capital and largest city of the Republic of Ireland, located2 near the midpoint of Irelands east coast, at the mouth of the River Liffey and at the centre of the Dublin region3. ...

Ramsden is also responsible for the achromatic eyepiece named after him, and also worked on new designs of electrostatic generators. He was elected to the Royal Society in 1786. An eyepiece is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes. ... The Royal Society of London for the Improvement of Natural Knowledge, known simply as the Royal Society, is claimed to be the oldest learned society still in existence. ...

In c.1785 or so, Ramsden provided a new large theodolite for General William Roy, of the Royal Engineers, which was used for a new survey of the distance between Greenwich, London and Paris. This work provided the basis for the subsequent Ordnance Survey of the counties of Britain. For his part with Roy in this work he received the Copley Medal in 1795. The Ramsden theodolite was used in the first Ordnance Survey of Southern Britain. ... William Roy (1726 - July 1, 1790), was a British surveyor, military draughtsman and antiquary. ... Image produced from the Ordnance Survey Get-a-map service. ... The Copley Medal is a scientific award for work in any field of science, the highest award granted by the Royal Society of London. ...

This article incorporates text from the public domain 1911 Encyclopædia Britannica. The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. ... The Eleventh Edition of the Encyclopædia Britannica (1911) in many ways represents the sum of knowledge at the beginning of the 20th century. ...