The measurement and control of small displacements

Charles Parsons stands among the greatest of the classical inventors. Son of the famous Earl of Rosse, he was impelled to invention not by personal profit but by a deep fascination with turning the natural world to human benefit. The steam turbine is, of course, the most celebrated of his inventions; and this in turn led him to develop the cutting of precision gears and to the study of propeller cavitation.

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