“A beam of luminous hydrogen canal rays has, owing to its velocity, exactly the same direction as that of the electric field in which it may be made to move.” MayMadeMovingFieldsRaysElectricBeamLuminousOwingHydrogenCanalsVelocity Author:Johannes Stark
“We can in fact first place the beam of rays of moving positive atomic ions in a plane perpendicular to the axis in which we see the spectral lines emitted by them.” FirstsFactsMovingLinesPlanesRaysBeamAeroplanesAxesIons Author:Johannes Stark
