The New Text-Book of Physics: An Elementary Course in Natural Philosophy Designed for Use in High Schools and Academies (Classic Reprint) - Tapa blanda

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Excerpt from The New Text-Book of Physics: An Elementary Course in Natural Philosophy Designed for Use in High Schools and Academies

The Text-book of Natural Philosophy, first published in 1868, is now thoroughly revised; and an essentially New Text-Book of Physics is offered with the hope that it will prove to be still more worthy of the esteem of the friends of sound learning, and still more useful to the very large number of science-teachers who have so long employed the older book.

That which chiefly distinguishes this New Text-Book is the prominence which it gives to the principle of energy. Physics has come to be universally regarded by scientists as "the science of matter and energy;" and I have felt, that, unless I could fairly present the principle of energy as the most vital element of the system, my work would be altogether out of harmony with the later views, and unworthy to be used in the education of the young, because it would fail to give the student any adequate idea of the present, state of the science.

Various changes in the arrangement of subjects have been accordingly made; and the doctrine of energy, in an elementary form such as it must take in so elementary a work, will be found giving tone to all departments of the course. The first three chapters, treating of Matter and Motion, will abundantly prepare the student for the study of Energy in the fourth; while, in the remaining chapters, he will be able to trace the exhibition of energy as seen in the phenomena of sound, heat, light, electricity, and machinery.

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