" Vronsky listened attentively to Levin, as he always did listen, obviously interested in his words.
"Yes, but the spiritualists say we don't know at present what this force is, but there is a force, and these are the conditions in which it acts.
Let the scientific men find out what the force consists in.
No, I don't see why there should not be a new force, if it..." "Why, because with electricity," Levin interrupted again, "every time you rub tar against wool, a recognized phenomenon is manifested, but in this case it does not happen every time, and so it follows it is not a natural phenomenon.