Diapositives of photographs taken with the Kew Photoheliograph
1860-1862
1860-1862
1860-1862
1935-05-12
1935-05-12
1935-05-12
1935
1935-05-12
1935
1935
1935-05-12
1934
1935
circa 1932
1935-05-12
1860-1862
1930
1860
1935-05-12
1935-05-12
1935
1935
1935-05-12
1935
1935-05-12
1935
1935
1935
1934
1935-05-12
circa 1933
1907
1860