Engravings of colour sketches showing solar prominences by Etienne Leopold Trouvelot
1872
1872
1870
1872
1871
1875
1936
1870-1872
1860-1868
1872
1886
1883
1898
1916-05
1893
1936
1885
1893
1889
1878
1936
1916; 1929
1916
1916
1872
1929
1908
1900
1895
1895
1898
1936
1936
1927
1895
1926
1928
1927