Background
Heinrich Schwabe was born on October 25, 1789 in Dessau, Germany.
(This is a reproduction of a book published before 1923. T...)
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Flora Anhaltina: Cryptogamia; Volume 2 Of Flora Anhaltina; Samuel Heinrich Schwabe
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Heinrich Schwabe was born on October 25, 1789 in Dessau, Germany.
Schwabe left the school in 1806 to become a pharmacist. From 1809 he studied pharmacy, chemistry, botany and physics at the University of Berlin in 1810-1812, under Klaproth and Hermbstädt. While at Berlin he became interested in astronomy and botany.
In 1843 Schwabe made his first definite statement regarding the periodicity of sunspots, giving statistics for 1826-1843.
He tabulated his results under four headings: the year, the number of groups of sunspots in the year, the number of days free from sunspots, and the number of days when observations were made.
Schwabe realized that with the modest apparatus in his private observatory, numerical determination was difficult: for instance, on days when there was a large number of spots, he had probably underestimated them.
His carefully compiled results demonstrated the existence of periodicity, although he wrongly estimated the period to be about ten years.
His discovery remained unnoticed until Humboldt drew attention to it in 1851.
The periodicity of sunspots is now fully recognized; and to Schwabe is thus due the credit of one of the most important discoveries in astronomy.
(This is a reproduction of a book published before 1923. T...)
A foreign member of the Royal Society.