The experimental filmmaker James Whitney planned a series of four alchemical films in the mid-1970s. Of these only one was made, called Dwija (1976),[17] described by William Wees as "an alchemical vessel dissolving and materialising again and again within a pulsating stream of coloured light."[18] Jordan Belson[17] and Harry Everett Smith[19] also referenced alchemical ideas and imagery in their experimental films. The German experimental filmmaker Jürgen Reble has referenced alchemical processes in his physical and chemical manipulation of the filmstrip, describing one particular work, Alchemy, as bridging the gap between the "processing and fixing" of the film.[20] In 2010 the moving image artist Richard Ashrowan created a video installation, Alchemist, which used texts by the twelfth century alchemist Michael Scot and included performances related to alchemical themes.