William Walker, Esqr.Lecturer on the Eidouranion.
Published as the Act directs Decr. 31, 1798, by Vernor & Hood, 31 Poultry.
Stipple engraving, 165 x 110mm. 6½ x 4¼". Soiled.
Magic Lantern interest. William Walker (1766? - 1816), lecturer on astronomy and eldest son of Adam Walker. He demonstrated the 'Eidouranion', or ‘Large Transparency Orrery’, invented by his father. It used some form of back projection to give astronomical effects on a screen. This was accompanied by Adam's lecturing and music played on a Celestina - a type of glass organ.
For a representation of the Eidouranion, see ref. 23427
[Ref: 9076] £95.00