Department of Physics and Astronomy - Home 355 fall...Josef Fraunhofer . Year 1820 1827 1831 1842...
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Department of Physics and Astronomy - Home 355 fall...Josef Fraunhofer . Year 1820 1827 1831 1842 1845 1849 1850 1864 1870 1875 1879 1880 1880 1882 1886 ... Alexander Graham Bell Gustav