Brown/yellow observation of the Sun, 26 June 1905
Brown/yellow observation of sunspots made by John Willis on 26 June 1905 between 5:30 and 6pm. On the reverse Willis has noted: "This drawing was made with much difficulty, owing to the cloudy state of the sky — JW." The spots are delineated. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.