 Electromagnetic phenomena in a system moving with any velocity smaller than that of light by Hendrik Antoon Lorentz

Primary facsimile: dwc.knaw.nl/DL/publications/PU00014148.pdf

Sections 1–3 state the aim of a systematic moving-system theory and begin from electron-theory field equations; sections 10–11 discuss assumptions about the deformation of moving matter and their optical consequences. This immediate pre-Einstein comparison is explicitly a twentieth-century work, not a nineteenth-century publication.