Excerpt from Introduction to Experimental Physics, Theoretical and Practical: Including Directions for Constructing Physical Apparatus and for Making Experiments

Everyone who has tried to teach elementary Physics must have become aware of the great difficulty which the subject presents to the majority of pupils. This difficulty is of a twofold kind, and arises partly from the nature of the facts with which the science deals, and partly from the nature of the reasoning, whereby the general laws of physics are established. A large pro portion of the facts are such as either do not fall within common experience at all, or do so only under such complex conditions that their true nature is not easily recognised and moreover the kind of knowledge which is required in physics, is much more accurate and precise than that with which we are accustomed to be satisfied in relation to matters of ordinary life. Hence, in beginning the study of physics, we are obliged, not only to learn a large number of new facts, but also to adopt new habits of learning; while we have, at the same time, to accustom ourselves to attach accurately defined meanings to the terms employed in discussing physical phenomena, and to reason about them with.

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