A photogram was an image created by focusing light on a surface, such as film, which was treated with an emulsion. Standard photograms were taken on film with a silver nitrate emulsion. Another specially prepared emulsion allowed photograms to show Dust. These photograms could be viewed using a projecting lantern. It was the closest Lyra Silvertongue had ever experienced to a cinema before she went with Will Parry in his world. Will's world also had photographs taken from cameras.
When the Consistorial Court of Discipline visited The Trout Inn, they put up photograms of Thomas Nugent. Later, when Lord Asriel was looking for funding for another expedition to the North, he used special photograms to show the Dust entering a man, and the city in the aurora to the scholars at Jordan College.
- Northern Lights
- Northern Lights - The Graphic Novel
- The Golden Compass (film)
- The Golden Compass (video game)
- His Dark Materials (TV series), Series 1
- La Belle Sauvage
- The Secret Commonwealth