It is often said that regions of coldness are associated with some paranormal events. Well, Edison's instrument was sensitive to a change of temperature of just a small fraction of a degree. Other conditions included magnetic field changes and ever so small puffs of air and sound vibrations so faint as to be inaudible. The members of this club all agreed that after death they would make every effort to set the machine off. Well, they all died, but the machine never went off.
Some people are very skeptical indeed about the reality of paranormal events.
They have organized a web ring of sites where a skeptical view is taken. There are other sites and other rings where a much more positive view of the paranormal is to be found. For example, Archive X has numerous stories of paranormal experiences and Obiwan's UFO-free Paranormal page contains many links to other sites of a similar nature. The Truth Tree's position on paranormal phenomena is much the same as its position on UFO's. That is, while the possibility of paranormal phenomena is not completely ruled out, objective evidence is necessary before any of the claims made can be accepted.