Draper's daguerreotype of Solar Spectrum
1842
1842
1842
1853
circa 1849
1840-1848
circa 1845
circa 1845
1840-1841
circa 1841
circa 1850
1845-1855
circa 1842
circa 1850
1844
1845-02-10
1846-04
circa 1845
1841-05-25
circa 1850
1851
1849
1849
1849
1849
1849
1849
1849
1849
circa 1850
1850