knowledge in their turn are framed. As transmissionists, we also must admit this to be the condition of all our usual thought. Sense-action is what lowers the brain-barrier. My voice and aspect, for instance, strike upon your ears and eyes; your brain thereupon becomes more pervious, and an awareness on your part of what I say and who I am slips into this world from the world behind the veil. But, in the mysterious phenomena to which I allude, it is often hard to see where the sense-organs can come in. A medium, for example, will show knowledge of his sitter's private affairs which it seems impossible he should have acquired through sight or hearing, or inference therefrom. Or you will have an apparition of some one who is now dying hundreds of miles away. On the production-theory one does not see from what sensations such odd bits of knowledge are produced. On the transmission-theory, they don't have to be 'produced,'—they exist ready-made in the transcendental
