most capable to receive the motive impress, must in like manner be moved. Now, we cannot conceive anything more capable of motion than the fluid matter that is interspersed among all bodies and is contiguous to them. So, then, the agitated parts of the brain begetting a motion in the proxime ether, it is propagated through the liquid medium, as we see the motion is which is caused by a stone thrown into the water. Now, when the thus moved matter meets with anything like that from which it received its primary impress, it will proportionably move it, as it is in musical strings tuned unisons; and thus the motion being conveyed from the brain of one man to the fancy of another, it is there received from the instrument of conveyance, the subtile matter, and the same kind of strings being moved, and much what after the same manner as in the first imaginant, the soul is awakened to the same apprehensions as were they that caused them. I pretend not to any exactness or infallibility in this account, foreseeing many scruples that must be removed to make it perfect. It is only an hint of the possibility of mechanically solving the phenomenon, though very likely it may require many other circumstances completely to make it out." There are abundant records of the marvels wrought by the imagination, when, under the influence of desire or fear, or even simple expectation, the attention is concentrated upon a particular spot or a particular set of circumstances; but of the conditions and nature of the operation almost nothing is known. It would seem as if there were a tendency in every act of the imagination to create that which it conceives, although it is only in rare cases that any palpable result ensues. Various cases of recovery from the gravest illness, some of which involved the arresting active, organic mischief, are recorded as brought about by the vehement impression made upon the imagination by a remedy supposed, but never really applied. The action of imaginative sympathy is even more startling. Dr. Tuke relates the following of a lady well known to him: "One day, she was walking past a public institution, and observed a child, in whom she was particularly interested, coming out through an iron gate. She saw that he let go the gate after opening it, and that it seemed likely to close upon him, and concluded that it would do so with such force as to crush his ankle; however, this did not happen. 'It was impossible,' she says, 'by word or act, to be quick enough to meet the supposed emergency; and, in fact, I found I could not move, for such intense pain came on my ankle, corresponding to the one I thought the boy would have injured, that I could only put my hand on it to lessen its extreme painfulness. _I am sure I did not move so as to strain or sprain it._ The walk home--a distance of about a quarter of a mile--was very laborious, and, in taking off my stocking, I found a circle round the ankle, as if it had