Ehler Voss 
Mediality on Trial 
Testing and Contesting Trance and other Media Techniques

This volume addresses controversies connected to the testing of the capacities and potentials of mediums. Today we commonly　associate the term ‘medium’ with the technical communication between transmitters and receivers. Yet this term likewise applies to　those who cooperate with agencies that exceed the presumed domain of the material world. Insofar as one presumes a division　between distinctly opposed categories of religion and the secular, technical media tend to be associated with the secular and human　(trance) mediums tend to be associated with religion after 1900. This volume concerns the ways in which the term　medium still marks an overlapping of – and thus problematizes – the aforementioned division between religion and the secular, the　personal and the technological.
The term medium carries with it a seed of doubt that is itself inseparable from investment in the medium’s power: insofar as they　communicate with an ‘other’ realm, mediums offer the hope and promise of new possibilities and improved efficiency, and thus of a　better life; yet they have simultaneously been under suspicion of altering (or even inventing) the messages they communicate. It is due　to this combination of promise and suspicion that ‘mediumism’ has tended to evoke scientific, religious, and moral controversies. Thus, 　we can speak of a ‘mediumistic trial’ – that is, a process in which a medium is put to the test concerning its potentials and　trustworthiness. Around 1800, experts were asked if a modern secular institution would be capable of inspiring, domesticating or　excluding trance mediumship. This question has stayed with us ever since, and the answers have remained inconclusive. That is why　the past and present of mediumship may be asked to elucidate each other.

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