Hawksbee, Francis (1660–1713)
Generator built by Francis Hauksbee. From Physico-Mechanical Experiments, 2nd Ed., London 1719.
Francis Hawksbee also known as Francis Hauksbee the Elder , was an English experimental physicist and student of Robert Boyle. Hawksbee was responsible for the double-cylinder air pump, with which he showed that air glows at low pressure when excited by an electric discharge. He also demonstrated that the transmission of sound through air is dependent on pressure.