Comet 1911. 4. (Brooks) H. Knox-Shaw, Helwan Observatory, Egypt, 1911, November, 3d 14h 50m, 30-inch Reflector, focal length, 135in, exposure, 15 min, 10" x 12".
Science Museum Group. Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw. 1929-731Science Museum Group Collection Online. Accessed February 21, 2023. https://collection.sciencemuseumgroup.org.uk/objects/co56892/glass-positive-comet-1911-iv-brooks-h-knox-shaw-black-and-white-transparencies-astrophotographs-comets.
#comet
Science Museum Group. Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw. 1929-731Science Museum Group Collection Online. Accessed February 21, 2023. https://collection.sciencemuseumgroup.org.uk/objects/co56892/glass-positive-comet-1911-iv-brooks-h-knox-shaw-black-and-white-transparencies-astrophotographs-comets.
#comet
Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw | Science Museum Group Collection
Glass positive:- Comet 1911 IV (Brooks) H. Knox-Shaw, Helwan Observatory, Egypt, 1911, November, 3d 14h 50m, 30-inch Reflector, focal length, 135in, exposure, 15 min, 10" x 12"collection.sciencemuseumgroup.org.uk
John Freeman
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