V. _The Od-Force is the usual channel of establishing mesmeric relation._—I take it for granted that the Od-force—the existence and some of the properties of which have been inductively ascertained by Von Reichenbach—is the same agent with that which Mesmer assumed to be the instrument in his operations. Then, in support of the above proposition, I cite two instances. Mr. Williamson, at my request, mesmerised and entranced the Rev. Mr. Fox at Weilbach, in the autumn of 1847. It was the second sitting, and Mr. Fox was beginning to pass from the initiatory stage of trance into trance half-waking. Mr. Williamson addressed him, and he returned an answer. Other parties in the room, including myself, then addressed Mr. Fox, and he seemed not to hear one of us. Then Mr. Williamson gave me his hand, and I again spoke to Mr. Fox; he then heard me, and spoke in answer. When, having left go Mr. Williamson’s hand, I spoke again to Mr. Fox, he heard me not. On my renewing contact with Mr. Williamson, Mr. Fox heard me again. He heard me as long as I was brought into relation with him, and that relation was clearly due to the establishment of an Od-current between myself and Mr. Williamson, with whom Mr. Fox was already in trance-relation. Every one who has seen something of Mesmerism will recognise in the above story one of its commonest phenomena. But a more conclusive instance still has been already mentioned in Letter X. M. Petetin made a chain of seven persons holding hands, the seventh holding the hand of a cataleptic patient, who at that time heard by her fingers only. When Dr. Petetin spoke to the fingers of the first, _i. e._ the most remote, person of the chain, the cataleptic person heard him as well as if he had spoken to her own fingers. Even when a stick was made to form part of the circuit, the cataleptic still heard Dr. Petetin’s whisper, uttered at the other end of the chain. _Not so, however, if one of the parties forming the chain wore silk gloves._ * * * * *