Gelatin-silver print photograms by Susan Derges
Museum no. E.2816-1990
Ernst Chladni was an 18th-century physicist who researched the visualisation of sound waves. He discovered that fine sand on a square metal plate formed geometrical patterns when a violin bow was vibrated across the edge of the plate. Derges made these images in a similar fashion, but with carborundum powder on photographic paper to produce photograms.