The history of seance communication may be traced back to the third century. It was during the 1800's that the sceance became popular mainly due to the stardom of the Fox sisters.
The early sceance tended to be dramatical with plenty of theatrics. These sceance usually took place in darkened parlors with a round table and some theatrics such as tables moving.
These days a sceance is far more casual and only involves mental mediumship.
Mediums consider music and sometimes prayers as helpfull to the success of the sceance. Sitters are not allowed to to touch the medium during a sceance. Younger sitters tend to attract more spirit attention than do older sitters.
A round table with a limit of eight chairs seems the best.
Hands are usually placed flat on the table or sometimes holding the hands of other sitters.
Ghosts
Paralumun New Age Village