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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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Observation of the Sun, April - October 1882

Observation of the Sun, April - October 1882

1882
Brown/grey striped observation of Jupiter, 16 November 1905

Brown/grey striped observation of Jupiter, 16 November 1905

1905
Brown/yellow observation of the Sun, 11 November 1883

Brown/yellow observation of the Sun, 11 November 1883

1883
Brown/grey striped observation of Jupiter, 24 November 1905

Brown/grey striped observation of Jupiter, 24 November 1905

1905
Brown/grey striped observation of Jupiter, 27 November 1905

Brown/grey striped observation of Jupiter, 27 November 1905

1905
Pale brown/cream observation of the Sun, 18 November 1883

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

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

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

1883
Brown/grey striped observation of Jupiter, 17 November 1905

Brown/grey striped observation of Jupiter, 17 November 1905

1905
Brown/grey brown striped observation of Jupiter, 4 March 1906

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

1906
Brown/pale yellow observation of the Sun, 14 January 1883

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

1883
Dark brown/yellow observation of the Sun, 17 May 1882

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

1882
Greenish grey/grey striped observation of Jupiter, 29 November 1905

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

1905
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
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 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
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
Watercolour observation of the bands of Jupiter made by John Willis, undated. Black/cream with the stripes filled in with watercolour. Willis may have matched the colours at the telescope. 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 coloured bands of Jupiter

1879-1906
Segment observation of sunspots made by John Willis on 19 July 1905 at 5:30pm. 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.

Observation of the Sun, 19 July 1905

1905
Assorted sunspots delineated on sheet by John Willis. One group was marked on 19 November 1882 and the other on 16 April 1882. 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, April and November 1882

1882
Preparation for a black/cream observation of sunspots by John Willis. It's ready for use but there's no date. There are two spots. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Preparation for observation of the Sun

1879-1906
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
Segment observation of sunspots made by John Willis on 22 July 1905 at 5pm. The spot is delineated and there is a black top 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, 22 July 1905

1905
Observation of sunspots made by John Willis on 15 April 1904 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.

Observation of the Sun, 15 April 1904

1904
Observation of sunspots by John Willis on 27 June 1905. The same group as previously drawn on this date 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, 27 June 1905

1905
Dark grey green/cream observation of sunspots made by John Willis on 15 May 1905 at 5pm. On the reverse Willis has noted a "Large spot" which is delineated on the drawing. 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/cream observation of the Sun, 15 May 1905

1905
Card disc with dark blue wash/cream and blue ink lines across made by John Willis, undated. It's inscribed "... Jupiter ... the Earth" [relative proportions] This is a template disc for drawing the outline of Jupiter. It's not round but flattened; the circle is ellipse. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Template for drawing the outline of Jupiter

1879-1906
Watercolour observation of the bands of Jupiter made by John Willis, undated. Black/cream with the stripes filled in with watercolour. Willis may have matched the colours at the telescope. 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 coloured bands of Jupiter

1879-1906
"Century" Vol XXIX No. 5, March 1885 photograph mounted on pale green card. This is a photograph of an ink wash sketch of Jupiter. Also shows transit of a satellite. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by John Willis in Folkestone between 1879 and 1906.

Photograph of ink wash sketch of Jupiter

1885
Black/cream observation of sunspots made by John Willis on 3 April 1893 at 2:30pm. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.

Black/cream observation of the Sun, 3 April 1893

1893
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
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
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
Brown/yellow observation of sunspots made by John Willis on 20 July 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, 20 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
Brown/yellow observation of sunspots made by John Willis on 5 August 1905 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.

Brown/yellow observation of the Sun, 5 August 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
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
Observation of sunspots made by John Willis on 5 July 1905 between 5 and 6pm. There is yellow around a delineated spot and black surround 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, 5 July 1905

1905
Black/yellow, ringed observation of sunspots made by John Willis on 5 May 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/yellow observation of the Sun, 5 May 1893

1893
Black/creamy yellow observation of sunspots made by John Willis on 23 April 1893 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.

Black/creamy yellow observation of the Sun, 23 April 1893

1893
Segment observation of sunspots made by John Willis on 13 August 1905 at 6pm. The spot 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, 13 August 1905

1905
Grey/yellow observation of sunspots made by John Willis on 7 April 1882 at 12:45am. 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, 7 April 1882

1882
Segment observation of sunspots made by John Willis on 21 July 1905 at 5pm. 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, 21 July 1905

1905
Observation of sunspots by John Willis on squared paper with a green surround, undated. There is a pencil calculation 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.

Observation of the Sun

1879-1906
Observation notes on the colour of the bands on Jupiter made by John Willis, undated. The drawing shows brown/cream pencilled into stripes of coloured bands. Willis has noted: "bluish / greyish / ruddy / yellowish / coppery or ruddy / white I" and on the reverse the colours run back through to bluish. 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 coloured bands of Jupiter

1879-1906
Dark blue/grey striped observation of Jupiter made by John Willis on 10 October 1892. On the reverse Willis has noted: "3 inch. 250. Sat II and its shadow". This drawing shows shadow transit of Europa. 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/grey striped observation of Jupiter, 10 October 1892

1892
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
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 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
Black to grey greenish/creamy yellow observation of sunspots made by John Willis on 20 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, 20 April 1893

1893