-
Period: to
William Crookes
Invented the Crookes Tube, which would be the device necessary for many of the early experiments in the discovery of the electron. It is of note that the Crookes Tube was later known as the Cathode Ray Tube. -
Arthur Schuster
Calculated charge to mass ratio bounds for the yet to be identified electron. -
Jean-Baptiste Perrin
Theorized that the cathode ray was composed of negatively charged particles that were from residual gas in tube being split apart. -
J.J. Thomson
Proposed negatively-charged electron as a fundamental particle after cathode ray tube experiments. -
Robert Millikan
Determined the charge of an electron.