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By Joseph John Thomson. Philosophical Magazine, series 5, 44, 293–316 (1897); DOI 10.1080/14786449708621070. Le Moyne College hosts the transcription.

Cited passages: electrostatic deflection, Figure 2; the second determination of mass-to-charge ratio; electrode-material comparisons.

A physicist.^[ref]

The Thomson charge-to-mass experiment used electric and magnetic deflections of cathode rays to investigate their charged constituents. It determines a charge-to-mass ratio; separating electric charge from mass requires additional information.

Joseph John Thomson received the award for theoretical and experimental research on electric currents through gases.^[ref] The Thomson charge-to-mass experiment connects cathode rays to the measurable charge-to-mass ratio of an Electron.