Many people, and many  mort , shown one by one in a sequence of photos. The woman in this  photo  can't see the  fantome  over her  tête . using mirrors in a situation like this doesn't work... mourn-viewing is not ordinarily a real time process, but actually requires a bit of asynchronism, thus the need to use a photographic medium.     Le récepteur changeait le son en images mobiles des morts, qui pouvaient flotter, libres et vivants, dans l'air.