the retina, which communicated the sensation to the optic nerve, by which it was conveyed to the brain. In all which they invariably succeeded, and shewed that the whole was clearly and connectedly understood. "When this had been minutely and extensively done on the several parts of the body, some medical gentlemen who were present were requested to catechise them on any of the topics they had learnt, for the purpose of assuring themselves and the audience that the children really and familiarly understood all that they had been catechised upon. One of the medical gentlemen, for himself and the others present, then stated publicly to the meeting, that the extent of the children's knowledge of this difficult science was beyond any thing that they could have conceived. And afterwards affirmed, that he had seen students who had attended the medical classes for six months, who did not know so much of the human body as these children now did." This experiment became more remarkable from a circumstance which took place within a few days afterwards, and which tended still more strongly to prove the permanence and efficiency of this method of imitating Nature; shewing, not only that truth when communicated as Nature directs, is easily received, and permanently retained upon the memory, but that all such truths when thus communicated, become more and more familiar to the mind, and more decidedly under the controul, and at the command of the will. The circumstance is thus recorded in the account of the experiment[20] from which we have already quoted. "At the close of the meeting, Mr Gall took farewell of his young friends, not expecting to have the pleasure of seeing them again; and (after a promised visit to Ravenstile,) he proceeded on the following Thursday to Rostrevor, where he found a numerous audience, (publicly called together by Lady Lifford, the Rev. Mr Jacobs, and others, to receive him,) already assembled.