Diapositives of photographs of sunspots taken by Elizabeth Beckley with the Kew Photoheliograph 1870-09
3 photographs of sunspots (Nos.3,12 & 23) of the 39 taken on the photoheliograph at Kew Observatory by Elizabeth Beckley in 1870, Sept 21-24, 26-29. Diapositives of photographs of sunspots taken by Elizabeth Beckley with the Kew Photoheliograph 1870