On entering upon this investigation, it will be of use to keep in mind, that all the sciences have, at particular periods of their history, been in the same uncertain and unsettled position, as that which Education at present occupies; and that each of them has in its turn, had to pass through an ordeal, similar to that which education is about to undergo. They have triumphantly succeeded; and their subsequent rapid advancement is the best proof that they are now placed on a solid and permanent foundation. It is of importance, therefore, in attempting to forward the science of education, that we should profit by the experience of those who have gone before us. They succeeded by a strict observation of facts, and a stern rejection of every species of mere supposition and opinion;--by an uncompromising hostility to prejudice and selfishness, and a fearless admission of truth wherever it was discovered. Such must be the conduct of the Educationist, if he expects to succeed in an equal degree. The history of astronomy as taught by astrologers, and of chemistry in the hands of the alchymist, should teach both the lovers and the fearers of change an important lesson. These pretended sciences being mere conjectures, were of use to nobody; and yet the boldness with which they were promulgated, and the confidence with which they were received, had the effect of suppressing enquiry, and shutting out the truth for several generations. Similar may be the effects of errors in education, and similar the danger of too easily admitting them. The adoption of plausible theories, or of erroneous principles, must lead into innumerable difficulties; and should they be hastily patronized, and authoritatively promulgated, the improvement of this first and most important of the sciences may be retarded for a century to come. The other sciences, during the last half century, have advanced with amazing rapidity. This has been the result of a strict adherence to well established facts, and their legitimate inferences.--A docile subjection of the mind to the results of experiment, and a candid confession and abandonment of fallacies, have characterized every benefactor of the sciences;--and the science of education must be advanced by an adherence to the same principles. The Educationist must be willing to abandon error, as well as to receive truth; and must resolutely shake off all conjecture and opinions not founded on fair and appropriate experiment. This course may appear tedious;--but it is the shortest and the best. By this mode of induction, all the facts which he is able to glean will assuredly be found to harmonize with nature, with reason, and with Scripture; and with these for his supporters, the Reformer in education has nothing to fear. His progress may be slow, but it will be sure; for every principle which he thus discovers, will enable him, not only to outrun his neighbours, but to confer a permanent and valuable boon upon posterity.