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Information about Georg Hartmann



Georg Hartmann (sometimes spelled Hartman; 1489, Eggolsheim near Forchheim, Bavaria - April 9 1564, Nuremberg) was a German engineer, instrument maker, author, printer, humanist, churchman, and astronomer.

At the age of 17, he began studying theology and mathematics at the University of Cologne. After finishing his studies, he travelled through Italy and finally settled in Nuremberg in 1518. There he constructed astrolabes, globes, sundials, quadrants (an instrument similar to the sextant) and other instruments. Hartmann was possibly the first to discover the inclination of Earth's magnetic field

His two published works were Perspectiva Communis (Nuremberg, 1542), a reprint of John Peckham's 1292 book on optics and Directorium (Nuremberg, 1554), a book on astrology. He also left Collectanea mathematica praeprimis gnomonicam spectania, 151 f. MS Vienna, Österreichische Nationalbibliothek, Quarto, Saec. 16 (1527-1528), an unpublished work on sundials and astrolabes that was translated by John Lamprey and published under the title of Hartmann's Practika in 2002.

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References

1. ^ MG Kivelson, CT Russell (1995), Introduction to Space Physics, Cambridge University Press, ISBN 0-521-45714-9; p. 3-5
2. ^ ART Jonkers (2004), Erdmagnetismus zur Zeit der Seefahrer, PHYSIK JOURNAL, 2004, p. 55-59; fulltext
3. ^ John Lamprey (2002), Hartmann's Practika 'Making Sundials and Astrolabes by Compass and Rule', ISBN 1-931947-00-7 lamprey@frii.com
4. ^ John P. Lamprey, An Examination of Two Groups of Georg Hartmann Sixteenth-century Astrolabes and the Tables Used in their Manufacture, ANNALS OF SCIENCE, 54, (1997), 111-142. 138.
5. ^ H. G. Klemm, Georg Hartmann aus Eggolsheim (1489-1564): Leben und Werk eines fräkischen Mathematiker und Ingenieurs (Wissenschaftliche und künsterlische Beiträge, Ehrenburg-Gymnasium Forscheim, Heft 8), (Forscheim, 1990).
6. ^ Hans Gunther Klemm, Magnetismus-Beobachtungen Bei Den Humanistischen Mathematikern Georg Hartmann und Georg Joachim Rheticus, (Erlangen, 1994).
14th century - 15th century - 16th century
1450s  1460s  1470s  - 1480s -  1490s  1500s  1510s
1486 1487 1488 - 1489 - 1490 1491 1492

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Subjects:     Archaeology - Architecture -
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Eggolsheim

Coat of arms Location

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For other places called Forchheim, see Forchheim (disambiguation)


Forchheim

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Country Germany
State | Bavaria
Administrative region | Upper Franconia
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Freistaat Bayern
Free State of Bavaria
Flag Coat of arms

Details
Location

Coordinates
Time zone CET/CEST (UTC+1/+2)
Administration
Country
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April 9 is the 1st day of the year (2nd in leap years) in the Gregorian calendar. There are 0 days remaining.

Events


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15th century - 16th century - 17th century
1530s  1540s  1550s  - 1560s -  1570s  1580s  1590s
1561 1562 1563 - 1564 - 1565 1566 1567

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Subjects:     Archaeology - Architecture -
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Nürnberg
Nuremberg
Nuremberg Kaiserburg
Coat of arms Location

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University of Cologne (German Universität zu Köln) is one of the oldest universities in Europe and, with over 44,000 students, the largest university in Germany. The university is part of the Deutsche Forschungsgemeinschaft, a society of Germany's leading research
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15th century - 16th century - 17th century
1480s  1490s  1500s  - 1510s -  1520s  1530s  1540s
1515 1516 1517 - 1518 - 1519 1520 1521

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Subjects:     Archaeology - Architecture -
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astrolabe is a historical astronomical instrument used by classical astronomers, navigators, and astrologers. Its many uses included locating and predicting the positions of the Sun, Moon, planets and stars; determining local time given local longitude and vice-versa; surveying;
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globe is a three-dimensional scale model of a spheroid celestial body such as a planet, star, or moon, in particular Earth, or, alternatively, a spherical representation of the sky with the stars (but without the Sun, Moon, or planets, because their positions vary relative to those
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sundial is a device that measures time by the position of the Sun. The most commonly seen designs, such as the 'ordinary' or standard garden sundial, cast a shadow on a flat surface marked with the hours of the day.
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This article is about the Sextant as used for navigation. For the astronomer's sextant, see Sextant (astronomical).
For the history and development of the sextant see Reflecting instruments


A sextant
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Earth's magnetic field (and the surface magnetic field) is approximately a magnetic dipole, with one pole near the north pole (see Magnetic North Pole) and the other near the geographic south pole (see Magnetic South Pole).
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