Warren De la Rue
1861, 24 September (taken) 1862, 9 May (published)
Sun Spots

Photogalvanograph
Archive Farms
The Patrick Montgomery Collection, Object No. 2019.544a
 
Monthly Notices of the Royal Astronomical Society, London : Priestley and Weale, Vol. XXII, No 7, May 9, 1862
 
LL/122092