Brown/yellow observation of sunspots made on 14 June 1905 at 5:30pm. On the reverse Willis has noted: "o. very clear, & air steady — 14.6.05. JW." and "Enlarged view of principal spot" which is delineated. o. refers to the astronomical symbol for the Sun. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 14 June 1905 1905
Brown/yellow observation of sunspots made by John Willis on 17 October 1905 at 10am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 17 October 1905 1905
Brown/yellow observation of sunspots made by John Willis on 19 July 1905 at 5:30pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 19 July 1905 1905
Brown/beige, ringed observation of sunspots made by John Willis on 27 April 1893 at 6:20pm. 6:30pm is pencilled on the reverse. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/beige observation of the Sun, 27 April 1893 1893
Turquoise/yellow observation of sunspots made by John Willis on 6 May 1904 at 4:45pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Turquoise/yellow observation of the Sun, 6 May 1904 1904
Observation of sunspots made by John Willis on 23 December 1883 at 12:30. His observations are pencilled on the sheet with north, east, south, west lines ruled. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 23 December 1883 1883
Black/yellow, ringed observation of sunspots made by John Willis on 1 April 1904 at 10:30am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Black/yellow observation of the Sun, 1 April 1904 1904
Segment observation of sunspots made by John Willis on 23 July 1905 at 5:35pm. Spots are delineated and there is a black left edge. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 23 July 1905 1905
Brown/yellow observation of sunspots made by John Willis on 22 November 1905 at 10am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 22 November 1905 1905
Brown/cream observation of sunspots made by John Willis on 27 June 1882 at 9:15. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/cream observation of the Sun, 27 June 1882 1882
Brown/yellow observation of sunspots made by John Willis on 14 July 1905 at 5:30pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 14 July 1905 1905
Blue grey/grey striped observation of Jupiter made by John Willis on 18 February 1885 at 10:10pm. On the reverse Willis has noted: "3 inch. 240. Transit of Sat. Io." One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Blue grey/grey striped observation of Jupiter, 18 February 1885 1885
Brown/cream observation of sunspots made by John Willis on 21 December 1884. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/cream observation of the Sun, 21 December 1884 1884
Brown/strong yellow observation of sunspots made by John Willis on 6 November 1905 at 10:15am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/strong yellow observation of the Sun, 6 November 1905 1905
Brown/yellow observation of sunspots made by John Willis on 26 October 1905 at 10:30am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 26 October 1905 1905
Black/bold yellow observation of sunspots made by John Willis on 3 April 1904 at 4:45pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Black/bold yellow observation of the Sun, 3 April 1904 1904
Segment observation of sunspots made by John Willis on 30 October 1905 between 9:50 and 10am. The spots are delineated and the corners are black blc, trc. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 30 October 1905 1905
Brown/yellow observation of sunspots made by John Willis on 2 July 1905 at 5:30pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 2 July 1905 1905
Observation of sunspots made by John Willis on 8 April 1904 at 5pm. A sunspot is delineated. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 8 April 1904 1904
Brown/yellow observation of sunspots made by John Willis on 23 July 1905 at 5:35pm. On the reverse Willis has noted: "Much faculae in neighbourhood of spots on preceding limb. JW" Faculae are areas of greater brightness on the Sun that are hotter; sunspots are cooler. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 23 July 1905 1905
Dark blue/yellow undated observation of sunspots by John Willis. 5pm is pencilled on the reverse. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Dark blue/yellow observation of the Sun 1879-1906
Observation of sunspots made by John Willis on 25 July 1885. A neat sunspot is delineated at x120 magnification. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 25 July 1885 1885
Turquoise/yellow observation of sunspots made by John Willis on 4 May 1904 at 4:45pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Turquoise/yellow observation of the Sun, 4 May 1904 1904
Brown/yellow observation of sunspots made by John Willis on 1 July 1905 at 5:30pm. On the reverse Willis has noted: "Much faculae on both limbs J.W." Faculae are areas of greater brightness on the Sun that are hotter; sunspots are cooler. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 1 July 1905 1905
Segment observation of sunspots made by John Willis on 29 August 1905 at 6pm. The spot is indicated. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 29 August 1905 1905
Turquoise/yellow observation of sunspots made by John Willis on 23 April 1904 at 5pm. 4:50pm is pencilled on the reverse. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Turquoise/yellow observation of the Sun, 23 April 1904 1904
Grey/yellow observation of sunspots made by John Willis on 4 April 1893 at 5pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Grey/yellow observation of the Sun, 4 April 1893 1893
Greyish/yellow observation of sunspots made by John Willis on 21 June 1904 at 6pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Grey/yellow observation of the Sun, 21 June 1904 1904
Segment observation of sunspots made by John Willis on 20 July 1905. The spots are delineated and there are black tlc. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Observation of the Sun, 20 July 1905 1905
Grey/yellow observation of sunspots made by John Willis on 17 March 1904 at 10:15am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Grey/yellow observation of the Sun, 17 March 1904 1904
Brown/cream observation of sunspots made by John Willis on 16 August 1885 at 10am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/cream observation of the Sun, 16 August 1885 1885
Brown/strong yellow observation of sunspots made by John Willis on 31 October 1905 at 9:50am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/strong yellow observation of the Sun, 31 October 1905 1905
Grey/yellow observation of sunspots made by John Willis on 23 April 1882. On the reverse Willis has written: "Note. This view of the sun had to be taken at intervals, as the weather was very stormy, and the glimpses of sunshine were 'few and far between', and there may have been many more spots (J.W. 23.4.82)" One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Grey/yellow observation of the Sun, 23 April 1882 1882
Grey green/yellow observation of sunspots made by John Willis on 19 May 1904 at 4:45pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Grey green/yellow observation of the Sun, 19 May 1904 1904
Brown/yellow observation of sunspots made by John Willis on 27 December 1905 at 10:30am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Brown/yellow observation of the Sun, 27 December 1905 1905
A paper prepared by John Willis to observe the Sun or Jupiter, but unused. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Unused brown/cream paper for observation of Jupiter 1879-1906
Black/creamy yellow, ringed observation of sunspots made by John Willis on 2 April 1893 at 3pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Black/creamy yellow observation of the Sun, 2 April 1893 1893