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Observations of the Sun and Jupiter by John Willis

Group of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906. Some include detailed spot diagrams, and some manuscript notes on the viewing conditions. Drawings 1-229 comprise studies of sunspots during 1882 (44), 1883 (5), 1884 (1), 1885 (12), 1893 (22), 1903 (1), 1904 (45), 1905 (96), and three undated. Drawings 230-275 comprise studies of Jupiter during 1879 (1), 1885 (4 + 1 photograph), 1890 (3), 1891 (1), 1892 (1), 1904 (2), 1905 (5), 1906 (2), and six undated, and [20] other papers prepared but unused. - Drawing 18, Eclipse of the Sun 17 May 1882.

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Pale brown/cream observation of the Sun, 16 December 1883

1883

Pale brown/cream observation of the Sun, 18 November 1883

1883

Observation of the Sun, April - October 1882

1882

Brown/grey striped observation of Jupiter, 17 November 1905

1905

Brown/grey striped observation of Jupiter, 16 November 1905

1905

Brown/grey brown striped observation of Jupiter, 4 March 1906

1906

Brown/pale yellow observation of the Sun, 14 January 1883

1883

Brown/yellow observation of the Sun, 11 November 1883

1883

Dark brown/yellow observation of the Sun, 17 May 1882

1882

Greenish grey/grey striped observation of Jupiter, 29 November 1905

1905

Brown/grey striped observation of Jupiter, 24 November 1905

1905

Brown/grey striped observation of Jupiter, 27 November 1905

1905
Grey brown/yellow observation of sunspots made by John Willis on 13 April 1893 at 6:20pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Grey brown/yellow observation of the Sun, 13 April 1893

1893
Brown/creamy yellow observation of sunspots made by John Willis on 26 November 1882 at 10:45am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Brown/creamy yellow observation of the Sun, 26 November 1882

1882
Turquoise/yellow observation of sunspots made by John Willis on 9 May 1904 at 6:15pm. 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, 9 May 1904

1904
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/yellow observation of sunspots made by John Willis on 15 September 1905 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.

Brown/yellow observation of the Sun, 15 September 1905

1905
Brown/yellow observation of sunspots made by John Willis on 4 August 1905 at 6:15pm. 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, 4 August 1905

1905
Brown/yellow observation of sunspots made by John Willis on 18 June 1905 at 5:30pm. On the reverse Willis has noted: "Much faculae on preceding limb, between the two spots. 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, 18 June 1905

1905
Yellow and black wash observation of sunspots made by John Willis on 26 March 1882 at 11:30am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Yellow/black observation of the Sun, 26 March 1882

1882
Pale brown/cream observation of sunspots made by John Willis on 21 May 1882 at 12. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Pale brown/cream observation of the Sun, 21 May 1882

1882
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
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/creamy yellow observation of sunspots made by John Willis on 12 November 1882 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/creamy yellow observation of the Sun, 12 November 1882

1882
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
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
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
Brown/cream observation of sunspots made by John Willis on 23 July 1882 at 11am. 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, 23 July 1882

1882
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/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
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
Pale grey/cream observation of sunspots made by John Willis on 2 July 1882 at 11am. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Pale grey/cream observation of the Sun, 2 July 1882

1882
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
Black/cream observation of sunspots made on 15 September 1885 at 9am. On the reverse the same is pencilled, plus rough spots. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Black/cream observation of the Sun, 15 September 1885

1885
Group of sunspots observed by John Willis on 23 April 1904 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.

Observation of the Sun, 23 April 1904

1904
Observation of sunspots made by John Willis on 25 March 1893 at 2:30pm. One 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, 25 March 1893

1893
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 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
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
Black/creamy yellow observation of sunspots made by John Willis on 25 April 1893 at 6:20pm. 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, 25 April 1893

1893
Black/yellow observation of sunspots made by John Willis on 19 February 1885 at 10:30am. On the reverse 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.

Black/yellow observation of the Sun, 19 February 1885

1885
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 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
Grey green/yellow observation of sunspots made by John Willis on 14 May 1904 at 4pm. 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, 14 May 1904

1904
Black/creamy observation of sunspots made by John Willis on 6 May 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.

Black/creamy observation of the Sun, 6 May 1893

1893
Brown/cream observation of sunspots made by John Willis on 25 January 1885 at 12. 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, 25 January 1885

1885
Pale grey/cream observation of sunspots made by John Willis on 7 February 1885 at 4pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Pale grey/cream observation of the Sun, 7 February 1885

1885
Black to greenish/creamy yellow, ringed observation of sunspots made by John Willis on 21 April 1893 at 6:30pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Black/green/yellow observation of the Sun, 21 April 1893

1893
Turquoise/yellow, ringed observation of sunspots made by John Willis on 6 April 1904 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.

Turquoise/yellow observation of the Sun, 6 April 1904

1904
Black/yellow, ringed observation of sunspots made by John Willis on 4 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, 4 April 1904

1904