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Archibald Williams explains the scientific principles behind common mechanisms and physical phenomena such as steam, electricity, light, and hydraulics. The text focuses on the fundamental operation of everyday devices rather than specific models or detailed technical specifications.

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Table of Contents

HOW IT WORKS.

of the gramophone wags from side to side and describes a snaky course (Fig. 151b). It makes no difference in talking-machines whether the reproducing stylus be moved sideways or vertically by the record, provided

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