Emelin found that when he held his watch to his right ear, a female patient of his heard the ticking in her left ear; if he held it to her own ear she heard nothing. He was, also, not a little astonished when another patient, in a distant town to which he traveled, revealed to him a whole series of professional meditations in which he had been plunged during his journey. And yet such a knowledge of the magnetizer's thoughts is nothing uncommon in well-qualified subjects who have been repeatedly magnetized. Mrs. Crowe mentions the case of a gentleman who was thus treated while he was at Malvern and his physician at Cheltenham. He was lying in magnetic sleep, when he suddenly sprang up, clapped his hands together, and broke out into loud laughter. His physician was written to and replied that on the same day he had been busy thinking of his patient, when a sudden knock at the door startled him and made him jump and clap his hands together. He then laughed heartily at his folly! (I. p. 140.) Dupotet once saw a striking illustration of the _rapport_ which may exist between two patients of the same magnetizer, even where the two are unknown to each other. He was treating some of his patients in a hospital in St. Petersburg, by means of magnetism, and found, to his surprise, that whenever he put one of them to sleep in the upper story, the other in the lower story would also instantly drop asleep, although she could not possibly be aware of what was going on upstairs. This happened, moreover, not once, but repeatedly, and for weeks in succession. If both were asleep when he came on his daily round, he needed only arouse one to hear the other awake with a start and utter loud cries.