Dissolving views

The dissolve effect was reportedly invented by phantasmagoria pioneer Paul de Philipsthal while in Ireland in 1804. He thought of using two lanterns to make the spirit of Samuel appear out of a mist in his representation of the Witch of Endor. While working out the desired effect, he got the idea of using the technique with landscapes. Another possible inventor is Henry Langdon Childe, who purportedly once worked for De Philipsthal. However, there's no documentation of Childe performing with a magic lantern before 1827. That year he presented "Scenic Views, showing the various effects of light and shade" with a series of subjects that would become classics in many dissolving view shows, while some had already been subjects in the London Diorama the years before. In 1826 Scottish magician and ventriloquist M. Henry's introduced what he referred to as "Beautiful Dissolvent Scenes", "imperceptibly changing views", "dissolvent views" and "Magic Views" which were created "by Machinery invented by M. Henry". The oldest known use of the term "dissolving views" occurs on playbills for Childe's shows at the Adelphi Theatre in London in 1837. Childe further popularized the dissolving views at the Royal Polytechnic Institution in the early 1840s. ==Technique and equipment==

Biunial lanterns, with two projecting optical sets in one apparatus, were produced to more easily project dissolving views. Probably the first biunial lantern, dubbed the "Biscenascope" was made by the optician Mr. Clarke and presented at the Royal Adelaide Gallery in London on December 5, 1840. ==References==