30. It was with the help of its perispirit that the spirit used to act upon its physical body; it is with this same fluid that it continues to manifest itself by acting upon inert matter, producing noises and moving tables and other objects, which it lifts, knocks down or carries about. There is nothing surprising about this phenomenon if we consider the fact that the most powerful motors use the most rarified and even imponderable fluids such as air, steam or electricity.
It is also with the help of its perispirit that the spirit enables a medium to write, speak or draw. Not having a tangible body to act ostensibly when it wants to manifest, it uses the medium's body and borrows its organs, with which it acts as if it were its own body by means of the fluidic emanation it pours out over the medium.