Johann Gottlob Kruger

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Johann Gottlob Kruger

Johann Gottlob Krüger (born June 15, 1715 in Halle (Saale) , † October 6, 1759 in Braunschweig ) was a German doctor and naturalist .

Life

The son of a watchmaker had attended the school at the orphanage in Halle . His health was fragile at a young age, but he possessed good gifts. Sponsored by Friedrich Hoffmann , he moved to the University of Halle at the age of fifteen in 1731 , where he initially studied natural history and mathematical sciences. In 1734, at the age of nineteen, he began lecturing on philosophy. In 1737 he became a Master of Philosophy and, after having stayed longer in Silesia for health reasons, became a Doctor of Medicine in 1742.

On August 5, 1743 he was made associate professor at the medical faculty, in 1744 in the Royal Prussian Academy of Sciences and in 1745 in the German Academy of Natural Scientists Leopoldina . In 1750 Krüger moved to the University of Helmstedt as a full professor of medicine and philosophy, where he treated subjects such as physics and experimental chemistry in his lectures. Krüger also took on organizational tasks at the Helmstedt University and was prorector in 1753 and 1756.

His niece was the philosopher Johanna Charlotte Unzer (née Ziegler) (1725–1799)

Act

Krüger belongs to the Age of Enlightenment . He represented a deism in which knowledge of nature becomes a form of worship. He was involved in the early research into electricity and, along with Christian Gottlieb Kratzenstein, is considered the founder of modern electrotherapy . However, it is incorrect that he invented the “weather conductor ” ( lightning rod ), as the Vilna rabbi Pinchas Hurwitz (1765–1821 ) claims in his book Sefer ha-Berit (Brno 1797). On the contrary, he thought that trying to avert lightning with “iron rods which are pointed at the top” was nonsensical, since such rods “lure the matter of lightning [...] here”. Instead, he recommended avoiding “all metal, all water and in general all things that can be strongly electrified” and to protect yourself with non-conductive materials such as pitch, glass and silk.

Fonts

  • Writing of the false miracles to Mr. Johann Friedrich Oppermann (1740) ( digitized in the Google book search)
  • Thoughts on Caffee, Thee and Toback (1743) ( digitized in the Google book search)
  • Natural science. Second edition 1744 ( digitized in the Google book search). A total of 3 volumes 1740–1749.
  • Johann Gottlob Krügers reply to his listeners, in which he gives you his thoughts on electricity and at the same time makes you aware of his future lessons (1744) ( digitized in the Google book search)
  • Thoughts of algebra, along with the prime numbers from 1 to 1,000,000. (1746) ( digitized in the Google book search)
  • History of the earth in the very ancient times (1746) ( digitized in the Google book search, digitized and full text in the German text archive )
  • Thoughts of the cold winter of 1740 (1741, digitized in Google book search) (second edition 1746, digitized in Google book search)
  • Dedication to Mrs. Philippine Charlotte, Duchess of Braunschweig a. Lüneburg in plan of a worldly wisdom for the woman (1751).
  • Dreams (1754). New improved edition with a preface by Johann August Eberhard 1785 ( digitized in the Google book search)
  • Attempt of an experimental soul theory (1756)
  • Thoughts on the causes of the earthquake (1756) ( digitized in the google book search)
  • Thoughts on the upbringing of children (second edition 1760) ( digitized in the Google book search)
  • Natural science. Fourth edition. Hemmerde, Halle in Magdeburg
  • Preface to Johannen Charlotten Unzerin's outline of a world whiteness for the woman (1751, second edition 1767) ( digitized in the Google book search)

literature

Web links

Footnotes

  1. ↑ Wolfram Kaiser: Johann Gottlob Krüger (1715–1759) and Christian Gottlieb Kratzenstein (1723–1795) as the founders of modern electrotherapy. In: Zahn- Mund- und Kieferheilkunde 65, 1977, pp. 539-554
  2. ↑ Resianne Fontaine: Natural Science in Covenant Code : Pinchas Hurwitz on Animals and Meteorological Phenomena . In: Sepharad in Ashkenaz (2002/2007), pp. 157-181 (171)
  3. ↑ dreams. The sixteenth dream . Pp. 81-86 books.google ; Thoughts on the causes of the earthquake p. 9–10 books.google
personal data
SURNAME Krüger, Johann Gottlob
BRIEF DESCRIPTION German doctor and naturalist
DATE OF BIRTH June 15, 1715
PLACE OF BIRTH Halle (Saale)
DATE OF DEATH October 6, 1759
Place of death Braunschweig