Brown/yellow observation of the Sun, 24 June 1905
Brown/yellow observation of sunspots made by John Willis on 24 June 1905 at 5:30pm. On the reverse Willis has noted: "These spots have much altered their appearance since the last drawing was made. 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.