ABSTRACT
The unknown world outside the diving bell occupies the same space as the physical one, and is superposed on it. An item of information, such as a divination of the future, a sudden insight, a correct guess, a piece of knowledge that may originally have come from someone now dead, occasionally enters a human mind. It is worth wondering whether it comes from that unknown world. Over the lifetime of the universe the unknown world will have come to share the same average temperature as the physical world on which it is superposed. Unfortunately, the average temperature of the physical world is itself badly known. However, it seems feasible to guess the unknown world is less bound to space than the physical one. This chapter discusses the ways of getting information from the unknown world, and instrumental methods which might be developed to do it.
