6 cards for Campbell-Stokes sunshine recorder (2 for each range of latitude), 1924. 6 cards for Campbell-Stokes sunshine recorder (2 for each range of latitude) 1924
Campbell type sunshine recorder bowl, from December 1891 to June 1892, unsigned, 1890. From Kew Observatory. Campbell sunshine recorder bowl, 1890 1890
Grey cards (4 of 27- 6, 10, 17 & 21), mounted on display board, for Campbell type sunshine recorder, March, unsigned, Britain, 1880. Used by John Francis Campbell in Scotland(?). Campbell type sunshine recorder card, 1880 1880
Grey cards (23 of 27) for Campbell type sunshine recorder, March 1880. Likely used by John Francis Campbell in Scotland Cards for Campbell type sunshine recorder 1880