Date of Birth: 11/15/1597
Place of birth: London
Citizenship: United Kingdom
Who discovered impermanence magnetic declination?
Born Henry Gellibrand in London (Aldersgate, London). He studied at Oxford, specializing in mathematics. Among the teachers was Henry, among others, himself Henry Saville (Henry Savile). It is known that in the Oxford Trinity College Gellibrand entered the year of the death of his father (also, incidentally, had time to learn kogda-to in Oxford). In 1619-m Gellibrand received a bachelor`s degree, in 1623 th he was awarded a master`s degree. That`s when he was a student at Oxford Gellibrand met with Henry Briggs (Henry Briggs). After studying Henry became a pastor in Chiddingstone, Kent (Chiddingstone, Kent).
Most of all, Henry Gellibrand known for his studies of the earth`s magnetic field. Kogda-to is Henry discovered that the magnetic declination (the angle of the compass) is not constant, but varies with time. He announced his discovery of Henry in 1635-m; Henry confirmed his thesis, based on the previous experiences of other scientists (previously interpreted is not quite accurate and complete). Own measurements Henry held in London in 1634-m; in his possession were also records of experiments William Borough (William Borough) 1580 th and Edmund Gunter (Edmund Gunter) 1622 th. The result of the analysis conducted Gellibrandom was quite straightforward - the slope of a few decades has changed markedly (by about 7 degrees). Gellibranda discovery, inter alia, has shown that, contrary to theories Gilbert William (William Gilbert), Earth`s magnetic field is not constant.
In 1635-m Henry published his findings in an article `A discourse mathematical on the variation of the magnetical needle, together with its admirable diminution lately discovered`.
Henry Gellibrand also discovered the method of measuring longitude by observing the eclipses. This discovery he made, processed data about the lunar eclipse of October 29, 1631 th; Analysis of data obtained from Canada and London (in particular, the difference between the beginning of the eclipse) helped to accurately calculate the distance between these points. Get info Henry helped Captain Thomas James, went on an expedition in search of a northwest passage (and at the time of the eclipse just located on one of the islands of the Canadian).
In 1633 Henry Gellibrand th published a collection of mathematical tables Henry Briggs, consisting of logarithms of trigonometric functions. These tables have been published under the title `Trigonometria Britannica`. Sam Briggs at the time of publication of this work has already been dead for three years.
For some time, Henry served as a professor of astronomy at the College of Gresham College; in this position he was succeeded by Edmund Gunter. Important role in the appointment to the post Gellibranda played Briggs; however, it took the appointment is not quite smooth - followed a religious scandal even lead to litigation. The conflict began Puritan beliefs and Henry published his submission William Bill (William Beale) Almanac, in which the Catholic saints exhibited `vtorosortnymi`.
Henry Gellibrand died in 1637-m; at the time of his death he was 39 years old. The cause of his death has become a fever. His body was buried in the cemetery of St Peter Le Poer. After the death of the scientist a number of his works (in particular, the work on the application of trigonometry to navigation and astronomy `Institution Trigonometrical` and extremely popular `Epitome of Navigation`) repeatedly reprinted.