Anæsthesia is observed only in the hand and arm holding the pencil. “Once or twice,” says Dr. X., “I have observed something like cramp seize the hand and arm, and extend along the shoulder blade, to the nape of the neck. On these occasions, I saw the whole arm vibrate after each rap, like the rebounding of an elastic band, and I have sometimes thought it looked as though the ‘fluid’ passed down the nerves of the arm into the pencil, as though it were flowing through a clear open channel, until it reached the point of the pencil, when a jerk of some kind appeared to force it out on to the wood; not that the pencil or arm _moves_ when the rap resounds, but one has the impression of an _interior_ jerk of some kind when, in moments of cramp, the rap is heard; this rebounding movement appears to be almost simultaneous with the rap. Though the medium keeps his personality alive, _as a rule_, it seems to me,” continues Dr. X. (whose opinion is shared by Professor Richet), “to undergo a diminution of some kind, on these occasions; ideation appears to be slower and more difficult. But, because his arm hurt him when this cramp came on, we have always begged him to cease; therefore we cannot say whether, the experiment courageously continued, complete anæsthesia would eventually set in, accompanied by psychical phenomena.” It is of importance to point out that both Professor Richet and Dr. X. (though Dr. Maxwell does not altogether share their opinion on this point) are inclined to believe that M. Meurice can tell _when_ raps are going to be given, when phenomena will be forthcoming and when they will not be forthcoming; a conclusion which is drawn from many observations.