Preparation for observation of the Sun

Made:
1879-1906

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.

Details

Category:
Art
Object Number:
2001-769/229
type:
drawing
credit:
Sotheby's (Olympia)