Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 635
PILE DKIVING. 609 Fig. 5.—Gramophone record (reduced). plate revolves, the style and parts connected with it are carried forward toward the centre ofthe disk, thus forming a spiral, sinuous line in the wax film. When the record is complete,the style is removed, and acid is admitted to the etching…
Mechanical engineering
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