1912, physicist Joseph John (J. J.) Thomson discovers mass spectrometry
At the end of the 18th century experimental scientists were aware that a spark generated electrostatically could travel longer distances in a partially evacuated glass tube than in air. The phenomenon began to receive rigorous scientific study in the mid-19th century with the advent of induction coils that could provide high voltages sustained over long periods of time and the availability of high capacity batteries to power the induction coils.
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