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Births
1711 – Georg Wilhelm Richmann, Russian physicist
1784 – Friedrich Bessel, German mathematician and astronomer
1887 – Gustav Ludwig Hertz, German physicist, Nobel laureate
1888 – Kirk Bryan, American geologist
1888 – Selman Waksman, Ukrainian-born biochemist, Nobel laureate
Deaths
1802 – Marie François Xavier Bichat, French anatomist
1826 – Giuseppe Piazzi, Italian astronomer
1922 – Jokichi Takamine, Japanese chemist
July 22, 2007