PROFESSOR (again looks round severely). And just as mathematical calculations have irrefutably proved the existence of imponderable ether which gives rise to the phenomena of light and electricity, so the successive investigations of the ingenious Hermann, of Schmidt, and of Joseph Schmatzhofen, have confirmed beyond a doubt the existence of a substance which fills the universe and may be called spiritual ether. FAT LADY. Ah, now I understand. I am so grateful.... LEONID FYODORITCH. Yes, but Alexey Vladimiritch, could you not ... condense it a little? PROFESSOR (not heeding the remark). And so, as I have just had the honor of mentioning to you, a succession of strictly scientific experiments have made plain to us the laws of mediumistic phenomena. These experiments have proved that, when certain individuals are plunged into a hypnotic state (a state differing from ordinary sleep only by the fact that man's physiological activity is not lowered by the hypnotic influence but, on the contrary, is always heightened--as we have recently witnessed), when, I say, any individual is plunged into such a state, this always produces certain perturbations in the spiritual ether--perturbations quite similar to those produced by plunging a solid body into liquid matter. These perturbations are what we call mediumistic phenomena.... [Laughter and whispers. SAHATOF. That is quite comprehensible and correct; but if, as you are kind enough to inform us, the plunging of the medium into a trance produces perturbations of the spiritual ether, allow me to ask why (as is usually supposed to be the case in spiritualistic seances) these perturbations result in an activity on the part of the souls of dead people? PROFESSOR. It is because the molecules of this spiritual ether are nothing but the souls of the living, the dead, and the unborn, and any vibration of the spiritual ether must inevitably cause a certain vibration of its atoms. These atoms are nothing but human souls, which enter into communication with one another by means of these movements. FAT LADY (to SAHATOF). What is it that puzzles you? It is so simple.... Thank you so, so much! LEONID FYODORITCH. I think everything has now been explained, and that we may commence. DOCTOR. The fellow is in a perfectly normal condition: temperature 37 decimal 2, pulse 74. PROFESSOR (takes out his pocket-book and notes this down). What I have just had the honor of explaining will be confirmed by the fact, which we shall presently have an opportunity of observing, that after the medium has been thrown into a trance his temperature and pulse will inevitably rise, just as occurs in cases of hypnotism.