INTRODUCTION.
§ 1. The science of Pedagogics cannot be derived from a simple principle with such exactness as Logic and Ethics. It is rather a mixed science which has its presuppositions in many others. In this respect it resembles Medicine, with which it has this also in common, that it must make a distinction between a sound and an unhealthy system of education, and must devise means to prevent or to cure the latter. It may therefore...
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