"Hermann Biow (1804–1850) was an early German photographer who worked with daguerreotypes. In partnership with Carl Ferdinand Stelzner, he opened Germany´s first daguerreotype studio in Hamburg ...
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in 1841. He is remembered for his images of the great fire in May 1842.
When Biow moved to Dresden in the late 1840s, his sister Jenny Bossard-Biow took over the Hamburg studio, where she continued to produce daguerreotypes. He died in Dresden in 1850 due to fumes from his photographic production process." - (en.wikipedia.org 25.12.2019)